help-mpi-common-sm.txt: remove stale opal_show_help() messages

These help messages are not referred to in code anywhere.

Signed-off-by: Jeff Squyres <jsquyres@cisco.com>

Author: jsquyres

opal/mca/common/sm/help-mpi-common-sm.txt

@@ -1,6 +1,6 @@
 # -*- text -*-
 #
-# Copyright (c) 2009-2010 Cisco Systems, Inc.  All rights reserved.
+# Copyright (c) 2009-2022 Cisco Systems, Inc.  All rights reserved.
 # Copyright (c) 2010-2012 Los Alamos National Security, LLC.
 #                         All rights reserved.
 #
@@ -22,13 +22,3 @@ Open MPI, and if not, contact the Open MPI developers.
   Requested size:    %ul
   Control seg size:  %ul
   Data seg aligment: %ul
-#
-[unexpected message id]
-Open MPI received an unexpected message ID during common sm initialization.
-This is likely an error in Open MPI itself.  If you see this error, you should
-see if there is an update available for Open MPI that addresses this issue, and
-if not, contact the Open MPI developers.
-
-  Local Host:          %s
-  Expected Message ID: %s
-  Message ID Received: %s