PML/UCX: don't do pml check during add_proc

    This is already done during MPI_Init (causes extra dmodex exchanges in some cases)

Signed-off-by: Valentin Petrov <valentinp@nvidia.com>

Author: Valentin Petrov

ompi/mca/pml/ucx/pml_ucx.c

@@ -412,15 +412,6 @@ static ucp_ep_h mca_pml_ucx_add_proc(ompi_communicator_t *comm, int dst)
 {
     ompi_proc_t *proc0     = ompi_comm_peer_lookup(comm, 0);
     ompi_proc_t *proc_peer = ompi_comm_peer_lookup(comm, dst);
-    int ret;
-
-    /* Note, mca_pml_base_pml_check_selected, doesn't use 3rd argument */
-    if (OMPI_SUCCESS != (ret = mca_pml_base_pml_check_selected("ucx",
-                                                               &proc0,
-                                                               dst))) {
-        return NULL;
-    }
-
     return mca_pml_ucx_add_proc_common(proc_peer);
 }