[svn-r10809] Removed duplicate declaration from mpi.h.in

Removed duplicate PMPI_Comm_create_group declaration.  Patch provided by Jed
Brown.

src/include/mpi.h.in

@@ -2025,7 +2025,6 @@ int PMPI_Comm_split_type(MPI_Comm comm, int split_type, int key, MPI_Info info,
 int PMPI_Comm_create_group(MPI_Comm comm, MPI_Group group, int tag, MPI_Comm *newcomm);
 
 /* MPI-3 "large count" routines */
-int PMPI_Comm_create_group(MPI_Comm comm, MPI_Group group, int tag, MPI_Comm * newcomm);
 int PMPI_Get_elements_x(const MPI_Status *status, MPI_Datatype datatype, MPI_Count *count);
 int PMPI_Status_set_elements_x(MPI_Status *status, MPI_Datatype datatype, MPI_Count count);
 int PMPI_Type_get_extent_x(MPI_Datatype datatype, MPI_Count *lb, MPI_Count *extent);