From: David Wells <wellsd2@rpi.edu>
Date: Sat, 28 Apr 2018 16:08:51 +0000 (-0400)
Subject: Clean up the headers in step-6.
X-Git-Tag: v9.0.0-rc1~53^2~2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=93d5233f7c7bbe08bf1682e97f59057f88902cd3;p=dealii.git

Clean up the headers in step-6.
---

diff --git a/examples/step-6/step-6.cc b/examples/step-6/step-6.cc
index 186c3f4882..ab7d72f5ac 100644
--- a/examples/step-6/step-6.cc
+++ b/examples/step-6/step-6.cc
@@ -23,29 +23,27 @@
 // The first few files have already been covered in previous examples and will
 // thus not be further commented on.
 #include <deal.II/base/quadrature_lib.h>
-#include <deal.II/base/function.h>
-#include <deal.II/base/logstream.h>
-#include <deal.II/lac/vector.h>
-#include <deal.II/lac/full_matrix.h>
-#include <deal.II/lac/sparse_matrix.h>
-#include <deal.II/lac/dynamic_sparsity_pattern.h>
-#include <deal.II/lac/solver_cg.h>
-#include <deal.II/lac/precondition.h>
-#include <deal.II/grid/tria.h>
+#include <deal.II/base/function_lib.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/grid/manifold_lib.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>
-#include <deal.II/numerics/matrix_tools.h>
+
+#include <deal.II/grid/tria.h>
+#include <deal.II/grid/grid_generator.h>
+
+#include <deal.II/lac/dynamic_sparsity_pattern.h>
+#include <deal.II/lac/full_matrix.h>
+#include <deal.II/lac/precondition.h>
+#include <deal.II/lac/solver_cg.h>
+#include <deal.II/lac/sparse_matrix.h>
+#include <deal.II/lac/vector.h>
+
 #include <deal.II/numerics/data_out.h>
+#include <deal.II/numerics/vector_tools.h>
 
 #include <fstream>
-#include <iostream>
 
 // From the following include file we will import the declaration of
 // H1-conforming finite element shape functions. This family of finite