message: Remove useless exact option when getting filtration from face
diff: @@ -102,9 +102,6 @@ class Cech_blocker {
  if (kernel_.squared_distance_d_object()(sph.first, cc_ptr_->get_point(face_opposite_vertex.second)) <= sph.second) {
  is_min_enclos_ball = true;
  sc_ptr_->assign_key(sh, sph_key);
  -#if CGAL_VERSION_NR >= 1050000000
  - if(exact_) CGAL::exact(sph.second);
  -#endif
  radius = sc_ptr_->filtration(face_opposite_vertex.first);
  #ifdef DEBUG_TRACES
  std::clog << "center: " << sph.first << ", radius: " << radius << std::endl;
  