From 82c344a5b08276d01e131bf949375518b310b4c5 Mon Sep 17 00:00:00 2001
From: Peter Munch <peterrmuench@gmail.com>
Date: Sun, 14 Mar 2021 13:19:17 +0100
Subject: [PATCH] Remove include files

---
 examples/step-1/step-1.cc     | 3 ---
 examples/step-10/step-10.cc   | 3 ---
 examples/step-11/step-11.cc   | 3 ---
 examples/step-12/step-12.cc   | 3 ---
 examples/step-12b/step-12b.cc | 3 ---
 examples/step-13/step-13.cc   | 3 ---
 examples/step-14/step-14.cc   | 3 ---
 examples/step-15/step-15.cc   | 3 ---
 examples/step-16/step-16.cc   | 3 ---
 examples/step-16b/step-16b.cc | 3 ---
 examples/step-17/step-17.cc   | 3 ---
 examples/step-18/step-18.cc   | 3 ---
 examples/step-2/step-2.cc     | 2 --
 examples/step-20/step-20.cc   | 3 ---
 examples/step-21/step-21.cc   | 3 ---
 examples/step-22/step-22.cc   | 3 ---
 examples/step-24/step-24.cc   | 3 ---
 examples/step-26/step-26.cc   | 3 ---
 examples/step-27/step-27.cc   | 3 ---
 examples/step-28/step-28.cc   | 3 ---
 examples/step-29/step-29.cc   | 3 ---
 examples/step-3/step-3.cc     | 8 --------
 examples/step-30/step-30.cc   | 3 ---
 examples/step-31/step-31.cc   | 3 ---
 examples/step-32/step-32.cc   | 3 ---
 examples/step-33/step-33.cc   | 3 ---
 examples/step-34/step-34.cc   | 3 ---
 examples/step-35/step-35.cc   | 3 ---
 examples/step-36/step-36.cc   | 3 ---
 examples/step-38/step-38.cc   | 1 -
 examples/step-4/step-4.cc     | 3 ---
 examples/step-40/step-40.cc   | 3 ---
 examples/step-41/step-41.cc   | 3 ---
 examples/step-42/step-42.cc   | 3 ---
 examples/step-43/step-43.cc   | 3 ---
 examples/step-46/step-46.cc   | 3 ---
 examples/step-47/step-47.cc   | 3 ---
 examples/step-49/step-49.cc   | 2 --
 examples/step-5/step-5.cc     | 3 ---
 examples/step-50/step-50.cc   | 3 ---
 examples/step-51/step-51.cc   | 3 ---
 examples/step-52/step-52.cc   | 3 ---
 examples/step-54/step-54.cc   | 2 --
 examples/step-55/step-55.cc   | 3 ---
 examples/step-56/step-56.cc   | 3 ---
 examples/step-58/step-58.cc   | 3 ---
 examples/step-59/step-59.cc   | 2 --
 examples/step-61/step-61.cc   | 3 ---
 examples/step-62/step-62.cc   | 1 -
 examples/step-63/step-63.cc   | 3 ---
 examples/step-67/step-67.cc   | 2 --
 examples/step-68/step-68.cc   | 2 --
 examples/step-7/step-7.cc     | 3 ---
 examples/step-70/step-70.cc   | 3 ---
 examples/step-74/step-74.cc   | 3 ---
 examples/step-8/step-8.cc     | 3 ---
 examples/step-9/step-9.cc     | 3 ---
 57 files changed, 166 deletions(-)

diff --git a/examples/step-1/step-1.cc b/examples/step-1/step-1.cc
index b14b0c5d5f..b700377d8f 100644
--- a/examples/step-1/step-1.cc
+++ b/examples/step-1/step-1.cc
@@ -20,9 +20,6 @@
 // The most fundamental class in the library is the Triangulation class, which
 // is declared here:
 #include <deal.II/grid/tria.h>
-// We need the following two includes for loops over cells and/or faces:
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 // Here are some functions to generate standard grids:
 #include <deal.II/grid/grid_generator.h>
 // Output of grids in various graphics formats:
diff --git a/examples/step-10/step-10.cc b/examples/step-10/step-10.cc
index ba5815f46f..c84dcb6a48 100644
--- a/examples/step-10/step-10.cc
+++ b/examples/step-10/step-10.cc
@@ -23,13 +23,10 @@
 #include <deal.II/base/quadrature_lib.h>
 #include <deal.II/base/convergence_table.h>
 #include <deal.II/grid/grid_generator.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/grid/manifold_lib.h>
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_out.h>
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/fe/fe_values.h>
 
 // This include file is new. Even if we are not solving a PDE in this tutorial,
diff --git a/examples/step-11/step-11.cc b/examples/step-11/step-11.cc
index 309e233618..582f1a5c8b 100644
--- a/examples/step-11/step-11.cc
+++ b/examples/step-11/step-11.cc
@@ -31,10 +31,7 @@
 #include <deal.II/lac/affine_constraints.h>
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 #include <deal.II/fe/fe_q.h>
 #include <deal.II/fe/fe_values.h>
diff --git a/examples/step-12/step-12.cc b/examples/step-12/step-12.cc
index c23bca2e08..e37afb6a87 100644
--- a/examples/step-12/step-12.cc
+++ b/examples/step-12/step-12.cc
@@ -30,12 +30,9 @@
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/grid_out.h>
 #include <deal.II/grid/grid_refinement.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/fe/fe_values.h>
 #include <deal.II/dofs/dof_handler.h>
 #include <deal.II/numerics/vector_tools.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 #include <deal.II/numerics/data_out.h>
 #include <deal.II/fe/mapping_q1.h>
diff --git a/examples/step-12b/step-12b.cc b/examples/step-12b/step-12b.cc
index 5b57f5f070..6ed6327854 100644
--- a/examples/step-12b/step-12b.cc
+++ b/examples/step-12b/step-12b.cc
@@ -29,11 +29,8 @@
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/grid_out.h>
 #include <deal.II/grid/grid_refinement.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/fe/fe_values.h>
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 #include <deal.II/numerics/data_out.h>
 #include <deal.II/fe/mapping_q1.h>
diff --git a/examples/step-13/step-13.cc b/examples/step-13/step-13.cc
index 9b0aaafbbd..e8fd58c771 100644
--- a/examples/step-13/step-13.cc
+++ b/examples/step-13/step-13.cc
@@ -38,11 +38,8 @@
 #include <deal.II/lac/affine_constraints.h>
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/grid/grid_refinement.h>
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 #include <deal.II/fe/fe_q.h>
 #include <deal.II/fe/fe_values.h>
diff --git a/examples/step-14/step-14.cc b/examples/step-14/step-14.cc
index 9e612bd39a..d2809dd2d5 100644
--- a/examples/step-14/step-14.cc
+++ b/examples/step-14/step-14.cc
@@ -34,11 +34,8 @@
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/grid_out.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/grid/grid_refinement.h>
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 #include <deal.II/fe/fe_q.h>
 #include <deal.II/fe/fe_values.h>
diff --git a/examples/step-15/step-15.cc b/examples/step-15/step-15.cc
index f633133420..b04aa60023 100644
--- a/examples/step-15/step-15.cc
+++ b/examples/step-15/step-15.cc
@@ -37,13 +37,10 @@
 
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/grid/manifold_lib.h>
 #include <deal.II/grid/grid_refinement.h>
 
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 
 #include <deal.II/fe/fe_values.h>
diff --git a/examples/step-16/step-16.cc b/examples/step-16/step-16.cc
index b90a68667a..5acb705c46 100644
--- a/examples/step-16/step-16.cc
+++ b/examples/step-16/step-16.cc
@@ -37,12 +37,9 @@
 #include <deal.II/lac/precondition.h>
 
 #include <deal.II/grid/tria.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/grid_refinement.h>
 
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 
 #include <deal.II/fe/fe_q.h>
diff --git a/examples/step-16b/step-16b.cc b/examples/step-16b/step-16b.cc
index 583524fab3..b36bc7c749 100644
--- a/examples/step-16b/step-16b.cc
+++ b/examples/step-16b/step-16b.cc
@@ -36,12 +36,9 @@
 #include <deal.II/lac/precondition.h>
 
 #include <deal.II/grid/tria.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/grid_refinement.h>
 
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 
 #include <deal.II/fe/fe_q.h>
diff --git a/examples/step-17/step-17.cc b/examples/step-17/step-17.cc
index 99c0e0b223..2ad279ab7b 100644
--- a/examples/step-17/step-17.cc
+++ b/examples/step-17/step-17.cc
@@ -34,10 +34,7 @@
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/grid_refinement.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 #include <deal.II/fe/fe_values.h>
 #include <deal.II/fe/fe_system.h>
diff --git a/examples/step-18/step-18.cc b/examples/step-18/step-18.cc
index 327e1967eb..7184fd9b6c 100644
--- a/examples/step-18/step-18.cc
+++ b/examples/step-18/step-18.cc
@@ -40,12 +40,9 @@
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/grid_refinement.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/grid/manifold_lib.h>
 #include <deal.II/grid/grid_tools.h>
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 #include <deal.II/dofs/dof_renumbering.h>
 #include <deal.II/fe/fe_values.h>
diff --git a/examples/step-2/step-2.cc b/examples/step-2/step-2.cc
index 74ea05a6f5..0d2a881530 100644
--- a/examples/step-2/step-2.cc
+++ b/examples/step-2/step-2.cc
@@ -21,8 +21,6 @@
 // The first few includes are just like in the previous program, so do not
 // require additional comments:
 #include <deal.II/grid/tria.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/grid/grid_generator.h>
 
 // However, the next file is new. We need this include file for the
diff --git a/examples/step-20/step-20.cc b/examples/step-20/step-20.cc
index e8bbd2faca..e001eb64f6 100644
--- a/examples/step-20/step-20.cc
+++ b/examples/step-20/step-20.cc
@@ -38,11 +38,8 @@
 
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/dofs/dof_handler.h>
 #include <deal.II/dofs/dof_renumbering.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 #include <deal.II/fe/fe_dgq.h>
 #include <deal.II/fe/fe_system.h>
diff --git a/examples/step-21/step-21.cc b/examples/step-21/step-21.cc
index d33a889c22..d7254a1324 100644
--- a/examples/step-21/step-21.cc
+++ b/examples/step-21/step-21.cc
@@ -39,13 +39,10 @@
 
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/grid/grid_tools.h>
 
 #include <deal.II/dofs/dof_handler.h>
 #include <deal.II/dofs/dof_renumbering.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 
 #include <deal.II/fe/fe_raviart_thomas.h>
diff --git a/examples/step-22/step-22.cc b/examples/step-22/step-22.cc
index 0738307a8f..d4e9bd2f88 100644
--- a/examples/step-22/step-22.cc
+++ b/examples/step-22/step-22.cc
@@ -35,14 +35,11 @@
 
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/grid/grid_tools.h>
 #include <deal.II/grid/grid_refinement.h>
 
 #include <deal.II/dofs/dof_handler.h>
 #include <deal.II/dofs/dof_renumbering.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 
 #include <deal.II/fe/fe_q.h>
diff --git a/examples/step-24/step-24.cc b/examples/step-24/step-24.cc
index 7b6e05937c..1a859089d8 100644
--- a/examples/step-24/step-24.cc
+++ b/examples/step-24/step-24.cc
@@ -36,11 +36,8 @@
 
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 
 #include <deal.II/fe/fe_q.h>
diff --git a/examples/step-26/step-26.cc b/examples/step-26/step-26.cc
index 724462efb0..8c6b6c9728 100644
--- a/examples/step-26/step-26.cc
+++ b/examples/step-26/step-26.cc
@@ -35,10 +35,7 @@
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/grid_refinement.h>
 #include <deal.II/grid/grid_out.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 #include <deal.II/fe/fe_q.h>
 #include <deal.II/fe/fe_values.h>
diff --git a/examples/step-27/step-27.cc b/examples/step-27/step-27.cc
index dcda4a9e52..898867bedc 100644
--- a/examples/step-27/step-27.cc
+++ b/examples/step-27/step-27.cc
@@ -37,10 +37,7 @@
 #include <deal.II/lac/affine_constraints.h>
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/grid/grid_refinement.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 #include <deal.II/fe/fe_q.h>
 #include <deal.II/numerics/vector_tools.h>
diff --git a/examples/step-28/step-28.cc b/examples/step-28/step-28.cc
index b9b5a06bba..103327010b 100644
--- a/examples/step-28/step-28.cc
+++ b/examples/step-28/step-28.cc
@@ -47,11 +47,8 @@
 #include <deal.II/grid/grid_refinement.h>
 #include <deal.II/grid/grid_out.h>
 #include <deal.II/grid/grid_generator.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 
 #include <deal.II/fe/fe_q.h>
diff --git a/examples/step-29/step-29.cc b/examples/step-29/step-29.cc
index 990f18f63e..c728b0f8f4 100644
--- a/examples/step-29/step-29.cc
+++ b/examples/step-29/step-29.cc
@@ -33,12 +33,9 @@
 
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/grid/manifold_lib.h>
 
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 
 #include <deal.II/fe/fe_q.h>
diff --git a/examples/step-3/step-3.cc b/examples/step-3/step-3.cc
index 684fce6e05..ef1764946e 100644
--- a/examples/step-3/step-3.cc
+++ b/examples/step-3/step-3.cc
@@ -28,14 +28,6 @@
 // And this is the file in which the functions are declared that create grids:
 #include <deal.II/grid/grid_generator.h>
 
-// The next three files contain classes which are needed for loops over all
-// cells and to get the information from the cell objects. The first two have
-// been used before to get geometric information from cells; the last one is
-// new and provides information about the degrees of freedom local to a cell:
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
-#include <deal.II/dofs/dof_accessor.h>
-
 // This file contains the description of the Lagrange interpolation finite
 // element:
 #include <deal.II/fe/fe_q.h>
diff --git a/examples/step-30/step-30.cc b/examples/step-30/step-30.cc
index cc943a12a6..43043d571b 100644
--- a/examples/step-30/step-30.cc
+++ b/examples/step-30/step-30.cc
@@ -31,10 +31,7 @@
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/grid_out.h>
 #include <deal.II/grid/grid_refinement.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 #include <deal.II/fe/fe_values.h>
 #include <deal.II/fe/mapping_q1.h>
diff --git a/examples/step-31/step-31.cc b/examples/step-31/step-31.cc
index c029702952..0421a2e75a 100644
--- a/examples/step-31/step-31.cc
+++ b/examples/step-31/step-31.cc
@@ -34,14 +34,11 @@
 
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/grid/grid_tools.h>
 #include <deal.II/grid/grid_refinement.h>
 
 #include <deal.II/dofs/dof_handler.h>
 #include <deal.II/dofs/dof_renumbering.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 
 #include <deal.II/fe/fe_q.h>
diff --git a/examples/step-32/step-32.cc b/examples/step-32/step-32.cc
index 3574a45edc..a218125105 100644
--- a/examples/step-32/step-32.cc
+++ b/examples/step-32/step-32.cc
@@ -47,8 +47,6 @@
 
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/grid/filtered_iterator.h>
 #include <deal.II/grid/manifold_lib.h>
 #include <deal.II/grid/grid_tools.h>
@@ -56,7 +54,6 @@
 
 #include <deal.II/dofs/dof_handler.h>
 #include <deal.II/dofs/dof_renumbering.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 
 #include <deal.II/fe/fe_q.h>
diff --git a/examples/step-33/step-33.cc b/examples/step-33/step-33.cc
index e9bf0c15e4..2e5cbfba2f 100644
--- a/examples/step-33/step-33.cc
+++ b/examples/step-33/step-33.cc
@@ -36,12 +36,9 @@
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/grid_out.h>
 #include <deal.II/grid/grid_refinement.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/grid/grid_in.h>
 
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 
 #include <deal.II/fe/fe_values.h>
diff --git a/examples/step-34/step-34.cc b/examples/step-34/step-34.cc
index f23eaafa3f..81192e8206 100644
--- a/examples/step-34/step-34.cc
+++ b/examples/step-34/step-34.cc
@@ -37,15 +37,12 @@
 #include <deal.II/lac/precondition.h>
 
 #include <deal.II/grid/tria.h>
-#include <deal.II/grid/tria_iterator.h>
-#include <deal.II/grid/tria_accessor.h>
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/grid_in.h>
 #include <deal.II/grid/grid_out.h>
 #include <deal.II/grid/manifold_lib.h>
 
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 
 #include <deal.II/fe/fe_q.h>
diff --git a/examples/step-35/step-35.cc b/examples/step-35/step-35.cc
index 8472332d0c..290ca7a390 100644
--- a/examples/step-35/step-35.cc
+++ b/examples/step-35/step-35.cc
@@ -47,12 +47,9 @@
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/grid_refinement.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/grid/grid_in.h>
 
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 #include <deal.II/dofs/dof_renumbering.h>
 
diff --git a/examples/step-36/step-36.cc b/examples/step-36/step-36.cc
index b0e6a09c23..392ab9f81c 100644
--- a/examples/step-36/step-36.cc
+++ b/examples/step-36/step-36.cc
@@ -32,10 +32,7 @@
 #include <deal.II/base/utilities.h>
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 #include <deal.II/fe/fe_q.h>
 #include <deal.II/fe/fe_values.h>
diff --git a/examples/step-38/step-38.cc b/examples/step-38/step-38.cc
index 614b6cd456..8c57bab3f8 100644
--- a/examples/step-38/step-38.cc
+++ b/examples/step-38/step-38.cc
@@ -38,7 +38,6 @@
 #include <deal.II/grid/grid_generator.h>
 
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 
 #include <deal.II/fe/fe_q.h>
diff --git a/examples/step-4/step-4.cc b/examples/step-4/step-4.cc
index cdca010d76..38a1869a36 100644
--- a/examples/step-4/step-4.cc
+++ b/examples/step-4/step-4.cc
@@ -25,9 +25,6 @@
 #include <deal.II/grid/tria.h>
 #include <deal.II/dofs/dof_handler.h>
 #include <deal.II/grid/grid_generator.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/fe/fe_q.h>
 #include <deal.II/dofs/dof_tools.h>
 #include <deal.II/fe/fe_values.h>
diff --git a/examples/step-40/step-40.cc b/examples/step-40/step-40.cc
index f948a306d9..c70a72d899 100644
--- a/examples/step-40/step-40.cc
+++ b/examples/step-40/step-40.cc
@@ -69,10 +69,7 @@ namespace LA
 #include <deal.II/lac/dynamic_sparsity_pattern.h>
 
 #include <deal.II/grid/grid_generator.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 #include <deal.II/fe/fe_values.h>
 #include <deal.II/fe/fe_q.h>
diff --git a/examples/step-41/step-41.cc b/examples/step-41/step-41.cc
index b54dc855c9..5007ca397b 100644
--- a/examples/step-41/step-41.cc
+++ b/examples/step-41/step-41.cc
@@ -40,14 +40,11 @@
 
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 
 #include <deal.II/fe/fe_q.h>
 #include <deal.II/fe/fe_values.h>
 
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 
 #include <deal.II/numerics/vector_tools.h>
diff --git a/examples/step-42/step-42.cc b/examples/step-42/step-42.cc
index a684ba9495..6bee380128 100644
--- a/examples/step-42/step-42.cc
+++ b/examples/step-42/step-42.cc
@@ -48,8 +48,6 @@
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/grid_tools.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/grid/manifold_lib.h>
 
 #include <deal.II/distributed/tria.h>
@@ -57,7 +55,6 @@
 #include <deal.II/distributed/solution_transfer.h>
 
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_renumbering.h>
 #include <deal.II/dofs/dof_tools.h>
 
diff --git a/examples/step-43/step-43.cc b/examples/step-43/step-43.cc
index 5163bbce66..2bb38c16b8 100644
--- a/examples/step-43/step-43.cc
+++ b/examples/step-43/step-43.cc
@@ -42,13 +42,10 @@
 
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/grid/grid_tools.h>
 
 #include <deal.II/dofs/dof_handler.h>
 #include <deal.II/dofs/dof_renumbering.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 
 #include <deal.II/fe/fe_q.h>
diff --git a/examples/step-46/step-46.cc b/examples/step-46/step-46.cc
index ac68526915..4f04abffc9 100644
--- a/examples/step-46/step-46.cc
+++ b/examples/step-46/step-46.cc
@@ -38,12 +38,9 @@
 
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/grid/grid_refinement.h>
 
 #include <deal.II/dofs/dof_tools.h>
-#include <deal.II/dofs/dof_accessor.h>
 
 #include <deal.II/fe/fe_q.h>
 #include <deal.II/fe/fe_nothing.h>
diff --git a/examples/step-47/step-47.cc b/examples/step-47/step-47.cc
index 5bda3cd333..5e9fad0339 100644
--- a/examples/step-47/step-47.cc
+++ b/examples/step-47/step-47.cc
@@ -41,15 +41,12 @@
 
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 
 #include <deal.II/fe/fe_q.h>
 #include <deal.II/fe/fe_values.h>
 #include <deal.II/fe/mapping_q.h>
 
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 
 #include <deal.II/numerics/vector_tools.h>
diff --git a/examples/step-49/step-49.cc b/examples/step-49/step-49.cc
index b4319f7a13..19a52ee6cb 100644
--- a/examples/step-49/step-49.cc
+++ b/examples/step-49/step-49.cc
@@ -29,8 +29,6 @@
 // @sect3{Include files}
 
 #include <deal.II/grid/tria.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/grid_tools.h>
 #include <deal.II/grid/manifold_lib.h>
diff --git a/examples/step-5/step-5.cc b/examples/step-5/step-5.cc
index e2eb706195..ae7283cfa8 100644
--- a/examples/step-5/step-5.cc
+++ b/examples/step-5/step-5.cc
@@ -33,9 +33,6 @@
 #include <deal.II/lac/precondition.h>
 #include <deal.II/grid/tria.h>
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 #include <deal.II/fe/fe_q.h>
 #include <deal.II/fe/fe_values.h>
diff --git a/examples/step-50/step-50.cc b/examples/step-50/step-50.cc
index 707d83e2ae..86111cf189 100644
--- a/examples/step-50/step-50.cc
+++ b/examples/step-50/step-50.cc
@@ -34,15 +34,12 @@
 #include <deal.II/base/parameter_handler.h>
 #include <deal.II/distributed/grid_refinement.h>
 #include <deal.II/distributed/tria.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 #include <deal.II/fe/fe_q.h>
 #include <deal.II/fe/fe_values.h>
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/grid_refinement.h>
 #include <deal.II/grid/tria.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/lac/affine_constraints.h>
 #include <deal.II/lac/dynamic_sparsity_pattern.h>
 #include <deal.II/lac/solver_cg.h>
diff --git a/examples/step-51/step-51.cc b/examples/step-51/step-51.cc
index 32536b711a..0299a783da 100644
--- a/examples/step-51/step-51.cc
+++ b/examples/step-51/step-51.cc
@@ -36,12 +36,9 @@
 #include <deal.II/lac/solver_bicgstab.h>
 #include <deal.II/lac/precondition.h>
 #include <deal.II/grid/tria.h>
-#include <deal.II/grid/tria_accessor.h>
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/grid_refinement.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_renumbering.h>
 #include <deal.II/dofs/dof_tools.h>
 #include <deal.II/fe/fe_dgq.h>
diff --git a/examples/step-52/step-52.cc b/examples/step-52/step-52.cc
index b1f0aa7577..66fb421846 100644
--- a/examples/step-52/step-52.cc
+++ b/examples/step-52/step-52.cc
@@ -26,13 +26,10 @@
 #include <deal.II/base/quadrature_lib.h>
 
 #include <deal.II/grid/grid_generator.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_out.h>
 
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 
 #include <deal.II/fe/fe_q.h>
diff --git a/examples/step-54/step-54.cc b/examples/step-54/step-54.cc
index 69b8179ff8..fe46668c14 100644
--- a/examples/step-54/step-54.cc
+++ b/examples/step-54/step-54.cc
@@ -22,8 +22,6 @@
 // various parts of the program. Most of them have been discussed in
 // previous tutorials already:
 #include <deal.II/grid/tria.h>
-#include <deal.II/grid/tria_iterator.h>
-#include <deal.II/grid/tria_accessor.h>
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/grid_in.h>
 #include <deal.II/grid/grid_out.h>
diff --git a/examples/step-55/step-55.cc b/examples/step-55/step-55.cc
index 8b35d9f6ae..4f2e5aa167 100644
--- a/examples/step-55/step-55.cc
+++ b/examples/step-55/step-55.cc
@@ -55,13 +55,10 @@ namespace LA
 #include <deal.II/lac/petsc_precondition.h>
 
 #include <deal.II/grid/grid_generator.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/grid/manifold_lib.h>
 #include <deal.II/grid/grid_tools.h>
 #include <deal.II/dofs/dof_handler.h>
 #include <deal.II/dofs/dof_renumbering.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 #include <deal.II/fe/fe_values.h>
 #include <deal.II/fe/fe_q.h>
diff --git a/examples/step-56/step-56.cc b/examples/step-56/step-56.cc
index 4ccce37e98..30cb6a09d5 100644
--- a/examples/step-56/step-56.cc
+++ b/examples/step-56/step-56.cc
@@ -36,14 +36,11 @@
 
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/grid/grid_tools.h>
 #include <deal.II/grid/grid_refinement.h>
 
 #include <deal.II/dofs/dof_handler.h>
 #include <deal.II/dofs/dof_renumbering.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 
 #include <deal.II/fe/fe_q.h>
diff --git a/examples/step-58/step-58.cc b/examples/step-58/step-58.cc
index 32f29daed5..6020278912 100644
--- a/examples/step-58/step-58.cc
+++ b/examples/step-58/step-58.cc
@@ -32,10 +32,7 @@
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/grid_refinement.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 #include <deal.II/fe/fe_q.h>
 #include <deal.II/fe/fe_values.h>
diff --git a/examples/step-59/step-59.cc b/examples/step-59/step-59.cc
index 8d03e3c96c..10401cf3c4 100644
--- a/examples/step-59/step-59.cc
+++ b/examples/step-59/step-59.cc
@@ -38,8 +38,6 @@
 #include <deal.II/fe/fe_tools.h>
 
 #include <deal.II/grid/tria.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/grid_tools.h>
 
diff --git a/examples/step-61/step-61.cc b/examples/step-61/step-61.cc
index 776f31e268..840c28a155 100644
--- a/examples/step-61/step-61.cc
+++ b/examples/step-61/step-61.cc
@@ -39,10 +39,7 @@
 #include <deal.II/lac/affine_constraints.h>
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 #include <deal.II/fe/fe_dgq.h>
 #include <deal.II/fe/fe_raviart_thomas.h>
diff --git a/examples/step-62/step-62.cc b/examples/step-62/step-62.cc
index 99bc192bd5..f321f88b38 100644
--- a/examples/step-62/step-62.cc
+++ b/examples/step-62/step-62.cc
@@ -29,7 +29,6 @@
 #include <deal.II/base/timer.h>
 #include <deal.II/base/utilities.h>
 
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_handler.h>
 #include <deal.II/dofs/dof_tools.h>
 
diff --git a/examples/step-63/step-63.cc b/examples/step-63/step-63.cc
index 3f24fc4268..91ecc7494a 100644
--- a/examples/step-63/step-63.cc
+++ b/examples/step-63/step-63.cc
@@ -38,13 +38,10 @@
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/grid_refinement.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/grid/manifold_lib.h>
 #include <deal.II/grid/grid_out.h>
 
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_renumbering.h>
 #include <deal.II/dofs/dof_tools.h>
 
diff --git a/examples/step-67/step-67.cc b/examples/step-67/step-67.cc
index d940ed1f2f..da823b06b4 100644
--- a/examples/step-67/step-67.cc
+++ b/examples/step-67/step-67.cc
@@ -36,8 +36,6 @@
 
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/tria.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 
 #include <deal.II/lac/affine_constraints.h>
 #include <deal.II/lac/la_parallel_vector.h>
diff --git a/examples/step-68/step-68.cc b/examples/step-68/step-68.cc
index 717d137ec0..9e20857076 100644
--- a/examples/step-68/step-68.cc
+++ b/examples/step-68/step-68.cc
@@ -39,8 +39,6 @@
 
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/grid_tools.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 
 #include <deal.II/lac/la_parallel_vector.h>
 #include <deal.II/lac/vector.h>
diff --git a/examples/step-7/step-7.cc b/examples/step-7/step-7.cc
index 62db0ddb52..88fdc17c6a 100644
--- a/examples/step-7/step-7.cc
+++ b/examples/step-7/step-7.cc
@@ -35,10 +35,7 @@
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/grid_refinement.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 #include <deal.II/fe/fe_q.h>
 #include <deal.II/numerics/matrix_tools.h>
diff --git a/examples/step-70/step-70.cc b/examples/step-70/step-70.cc
index 62fcc1d57f..8ddfb1f216 100644
--- a/examples/step-70/step-70.cc
+++ b/examples/step-70/step-70.cc
@@ -57,7 +57,6 @@ namespace LA
 #include <deal.II/distributed/solution_transfer.h>
 #include <deal.II/distributed/tria.h>
 
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_handler.h>
 #include <deal.II/dofs/dof_renumbering.h>
 #include <deal.II/dofs/dof_tools.h>
@@ -73,8 +72,6 @@ namespace LA
 #include <deal.II/grid/grid_in.h>
 #include <deal.II/grid/grid_tools.h>
 #include <deal.II/grid/manifold_lib.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 
 #include <deal.II/lac/affine_constraints.h>
 #include <deal.II/lac/dynamic_sparsity_pattern.h>
diff --git a/examples/step-74/step-74.cc b/examples/step-74/step-74.cc
index 947246885f..cbdb69fcf6 100644
--- a/examples/step-74/step-74.cc
+++ b/examples/step-74/step-74.cc
@@ -30,11 +30,8 @@
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/grid_out.h>
 #include <deal.II/grid/grid_refinement.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/fe/fe_values.h>
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 #include <deal.II/numerics/data_out.h>
 #include <deal.II/fe/mapping_q1.h>
diff --git a/examples/step-8/step-8.cc b/examples/step-8/step-8.cc
index 18e2c6e196..95e20065bc 100644
--- a/examples/step-8/step-8.cc
+++ b/examples/step-8/step-8.cc
@@ -37,11 +37,8 @@
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/grid_refinement.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 
 #include <deal.II/fe/fe_values.h>
diff --git a/examples/step-9/step-9.cc b/examples/step-9/step-9.cc
index 8a89bba69e..acc45a6422 100644
--- a/examples/step-9/step-9.cc
+++ b/examples/step-9/step-9.cc
@@ -33,10 +33,7 @@
 #include <deal.II/grid/tria.h>
 #include <deal.II/grid/grid_generator.h>
 #include <deal.II/grid/grid_refinement.h>
-#include <deal.II/grid/tria_accessor.h>
-#include <deal.II/grid/tria_iterator.h>
 #include <deal.II/dofs/dof_handler.h>
-#include <deal.II/dofs/dof_accessor.h>
 #include <deal.II/dofs/dof_tools.h>
 #include <deal.II/fe/fe_values.h>
 #include <deal.II/numerics/vector_tools.h>
-- 
2.39.5