remove two spurious colons

[[Imported from SVN: r7393]]

dune/solvers/iterationsteps/mmgstep.hh

@@ -23,13 +23,13 @@ public:
     MonotoneMGStep() {}
     
     MonotoneMGStep(int numLevels)
-    DUNE_DEPRECATED_MSG("The number of levels is no longer set explicitely, but instead inferred from the number of transfer operators. Just erase the number of levels from the argument list in your constructor call.") :
+    DUNE_DEPRECATED_MSG("The number of levels is no longer set explicitely, but instead inferred from the number of transfer operators. Just erase the number of levels from the argument list in your constructor call.")
     {}
     
     MonotoneMGStep(const MatrixType& mat, 
                    VectorType& x, 
                    VectorType& rhs, int numLevels)
-    DUNE_DEPRECATED_MSG("The number of levels is no longer set explicitely, but instead inferred from the number of transfer operators. Just erase the number of levels from the argument list in your constructor call.") :
+    DUNE_DEPRECATED_MSG("The number of levels is no longer set explicitely, but instead inferred from the number of transfer operators. Just erase the number of levels from the argument list in your constructor call.")
         : MultigridStep<MatrixType, VectorType>(mat, x, rhs, numLevels)
     {
         oldCritical.resize(x.size(), false);