cleanup of construction order in spdatacollector

dune/vtk/datacollectors/spdatacollector.hh

@@ -73,8 +73,8 @@ protected:
   using Super::gridView_;
   std::array<int, 6> wholeExtent_;
   std::array<int, 6> extent_;
-  FieldVector<ctype,3> spacing_;
   FieldVector<ctype,3> origin_;
+  FieldVector<ctype,3> spacing_;
   std::vector<std::size_t> indexMap_;
 };
 

src/polygongrid.cc

@@ -19,7 +19,6 @@
 #include <dune/vtk/writers/vtkunstructuredgridwriter.hh>
 
 using namespace Dune;
-using namespace Dune::Functions;
 
 using GridType = Dune::PolygonGrid<double>;