[clenaup] Stop using deprecated method

dune/fufem/python/conversion.hh

@@ -321,8 +321,7 @@ struct Conversion<Dune::GridFactory<GridType> >
         Reference elementIt = iter(grid.get("elements"));
         for(Reference element = next(elementIt); element; element = next(elementIt))
         {
-            Dune::GeometryType type;
-            type.makeFromVertices(dim, size(element));
+            auto type = Dune::geometryTypeFromVertexCount(dim, size(element));
             gridFactory.insertElement(type, element.toC<Element>());
         }