remove old flag WITH_INDEX_SETS, because it is not used anymore

[[Imported from SVN: r4683]]

bin/duneproject

@@ -324,7 +324,7 @@ noinst_PROGRAMS = ${CMODULE}
 
 ${CMODULE}_SOURCES = $CMODULE.cc
 
-${CMODULE}_CXXFLAGS = \$(MPI_CPPFLAGS) \$(UG_CPPFLAGS) \$(AMIRAMESH_CPPFLAGS) \$(ALBERTA_CPPFLAGS) -DWITH_INDEX_SETS
+${CMODULE}_CXXFLAGS = \$(MPI_CPPFLAGS) \$(UG_CPPFLAGS) \$(AMIRAMESH_CPPFLAGS) \$(ALBERTA_CPPFLAGS)
 ${CMODULE}_LDADD = \$(MPI_LDFLAGS) \$(ALBERTA_LDFLAGS) \$(ALBERTA_LIBS) \$(AMIRAMESH_LDFLAGS) \$(AMIRAMESH_LIBS) \$(UG_LDFLAGS) \$(UG_LIBS) \$(MPI_LDFLAGS) \$(DUNE_LDFLAGS) \$(DUNE_LIBS)
 
 # don't follow the full GNU-standard