Remove vertexnormals.hh file - it is not needed anymore

dune/gfe/vertexnormals.hh

-// -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
-// vi: set et ts=4 sw=2 sts=2:
-#ifndef DUNE_GFE_VERTEXNORMALS_HH
-#define DUNE_GFE_VERTEXNORMALS_HH
-
-#include <vector>
-
-#include <dune/common/fvector.hh>
-
-#include <dune/geometry/referenceelements.hh>
-
-#include <dune/matrix-vector/crossproduct.hh>
-
-#include <dune/gfe/unitvector.hh>
-
-/** \brief Compute averaged vertex normals for a 2d-in-3d grid
- */
-template <class GridView>
-std::vector<UnitVector<typename GridView::ctype,3> > computeVertexNormals(const GridView& gridView)
-{
-  const auto& indexSet = gridView.indexSet();
-
-  assert(GridView::dimension == 2);
-
-  std::vector<Dune::FieldVector<typename GridView::ctype,3> > unscaledNormals(indexSet.size(2));
-  std::fill(unscaledNormals.begin(), unscaledNormals.end(), Dune::FieldVector<typename GridView::ctype,3>(0.0));
-
-  for (const auto& element : elements(gridView))
-  {
-    for (std::size_t i=0; i<element.subEntities(2); i++)
-    {
-      auto cornerPos = Dune::ReferenceElements<double,2>::general(element.type()).position(i,2);
-      auto tangent = element.geometry().jacobianTransposed(cornerPos);
-      auto cornerNormal = Dune::MatrixVector::crossProduct(tangent[0], tangent[1]);
-      cornerNormal /= cornerNormal.two_norm();
-
-      unscaledNormals[indexSet.subIndex(element,i,2)] += cornerNormal;
-    }
-  }
-
-  // Normalize
-  for (auto& normal : unscaledNormals)
-    normal /= normal.two_norm();
-
-  // Convert array of vectors to array of UnitVectors
-  std::vector<UnitVector<typename GridView::ctype,3> > result(indexSet.size(2));
-
-  for (std::size_t i=0; i<unscaledNormals.size(); i++)
-    result[i] = unscaledNormals[i];
-
-  return result;
-}
-
-
-#endif