[cleanup]Replace Dune::Std::bool_constant by std::bool_constant

dune/fufem/makesphere.hh

@@ -5,6 +5,7 @@
 
 #include <cmath>
 #include <memory>
+#include <type_traits>
 
 #include <dune/common/hybridutilities.hh>
 
@@ -184,7 +185,7 @@ std::unique_ptr<GridType> makeSphereOnOctahedron(const Dune::FieldVector<field_t
   for (int i=0; i<8; i++)
   {
     // If the grid is sd the element boundaries carry a parametrization
-    Dune::Hybrid::ifElse(Dune::Std::bool_constant<GridType::dimension==3>{},
+    Dune::Hybrid::ifElse(std::bool_constant<GridType::dimension==3>{},
     [&](auto id)
     {
         auto boundarySegment = std::make_shared<SphereTriSegment>(pos[segments[i][0]],
@@ -202,7 +203,7 @@ std::unique_ptr<GridType> makeSphereOnOctahedron(const Dune::FieldVector<field_t
     else
       cornerIDs = {segments[i][0], segments[i][1], segments[i][2], 6};
 
-    Dune::Hybrid::ifElse(Dune::Std::bool_constant<GridType::dimension==2>{},
+    Dune::Hybrid::ifElse(std::bool_constant<GridType::dimension==2>{},
     [&](auto id)
     {
       // Insert parametrized element