remove unused variable in step-12

diff --git a/examples/step-12/step-12.cc b/examples/step-12/step-12.cc
index 1a4ff62df84c9a11d1d1f5f69e2d04e0fbe94907..b72416fce1eb613474550fae5db38cce08830fb4 100644 (file)
--- a/examples/step-12/step-12.cc
+++ b/examples/step-12/step-12.cc
@@ -235,8 +235,6 @@ namespace Step12
     FE_DGQ<dim>     fe;
     DoFHandler<dim> dof_handler;
 
-    AffineConstraints<> constraints;
-
     // The next four members represent the linear system to be solved.
     // <code>system_matrix</code> and <code>right_hand_side</code> are generated
     // by <code>assemble_system()</code>, the <code>solution</code> is computed