HDF5IO.hpp, remove useless preprocessor directives

the selection of the proper version of HDF5 routines is now done via the
macro H5_USE_16_API, rather than with #define H5Dcreate_vers etc.

lifev/core/filter/HDF5IO.hpp

@@ -50,17 +50,6 @@ along with LifeV.  If not, see <http://www.gnu.org/licenses/>.
 #ifdef LIFEV_HAS_HDF5
 #ifdef HAVE_MPI
 
-#ifndef H5Dcreate_vers
-#define H5Dcreate_vers 2
-#endif
-
-#ifndef H5Dopen_vers
-#define H5Dopen_vers 2
-#endif
-
-#ifndef H5Gcreate_vers
-#define H5Gcreate_vers 2
-#endif
 #include <hdf5.h>
 
 #include <Epetra_MpiComm.h>