oshmem: there's no fortran sentinels in oshmem

Turns out that this is just copy-n-pasted code from OMPI.  To be
clear: there's no need for the oshmem layer to instantiate sentinels
like mpi_fortran_bottom.

Thanks @jsquyres for pointing this.

oshmem/runtime/oshmem_shmem_init.c

@@ -107,87 +107,6 @@ MPI_Comm oshmem_comm_world = {0};
 
 opal_thread_t *oshmem_mpi_main_thread = NULL;
 
-/* Constants for the Fortran layer.  These values are referred to via
- common blocks in the Fortran equivalents.  See
- ompi/mpi/f77/constants.h for a more detailed explanation.
-
- The values are *NOT* initialized.  We do not use the values of
- these constants; only their addresses (because they're always
- passed by reference by Fortran).  
-
- Initializing upon instantiation these can reveal size and/or
- alignment differences between Fortran and C (!) which can cause
- warnings or errors upon linking (e.g., making static libraries with
- the intel 9.0 compilers on 64 bit platforms shows alignment
- differences between libmpi.a and the user's application, resulting
- in a linker warning).  FWIW, if you initialize these variables in
- functions (i.e., not at the instantiation in the global scope), the
- linker somehow "figures it all out" (w.r.t. different alignments
- between fortan common blocks and the corresponding C variables) and
- no linker warnings occur.
-
- Note that the rationale for the types of each of these variables is
- discussed in ompi/include/mpif-common.h.  Do not change the types
- without also modifying ompi/mpi/f77/constants.h and
- ompi/include/mpif-common.h.
- */
-
-#define INST(type, value, upper_case, lower_case, single_u, double_u)   \
-    type lower_case = value; \
-type upper_case = value; \
-type single_u = value;  \
-type double_u = value
-
-INST(int,
-     0,
-     MPI_FORTRAN_BOTTOM,
-     mpi_fortran_bottom,
-     mpi_fortran_bottom_,
-     mpi_fortran_bottom__);
-INST(int,
-     0,
-     MPI_FORTRAN_IN_PLACE,
-     mpi_fortran_in_place,
-     mpi_fortran_in_place_,
-     mpi_fortran_in_place__);
-INST(char *,
-     NULL,
-     MPI_FORTRAN_ARGV_NULL,
-     mpi_fortran_argv_null,
-     mpi_fortran_argv_null_,
-     mpi_fortran_argv_null__);
-INST(double,
-     0.0,
-     MPI_FORTRAN_ARGVS_NULL,
-     mpi_fortran_argvs_null,
-     mpi_fortran_argvs_null_,
-     mpi_fortran_argvs_null__);
-INST(int *,
-     NULL,
-     MPI_FORTRAN_ERRCODES_IGNORE,
-     mpi_fortran_errcodes_ignore,
-     mpi_fortran_errcodes_ignore_,
-     mpi_fortran_errcodes_ignore__);
-INST(int *,
-     NULL,
-     MPI_FORTRAN_STATUS_IGNORE,
-     mpi_fortran_status_ignore,
-     mpi_fortran_status_ignore_,
-     mpi_fortran_status_ignore__);
-INST(double,
-     0.0,
-     MPI_FORTRAN_STATUSES_IGNORE,
-     mpi_fortran_statuses_ignore,
-     mpi_fortran_statuses_ignore_,
-     mpi_fortran_statuses_ignore__);
-
-/*
- * Hash tables for MPI_Type_create_f90* functions
- */
-opal_hash_table_t ompi_mpi_f90_integer_hashtable = {{0}};
-opal_hash_table_t ompi_mpi_f90_real_hashtable = {{0}};
-opal_hash_table_t ompi_mpi_f90_complex_hashtable = {{0}};
-
 static int _shmem_init(int argc, char **argv, int requested, int *provided);
 
 #if OSHMEM_OPAL_THREAD_ENABLE