Remove duplicates from liboafs_util.la.sym

Remove duplicates from liboafs_util.la.sym

Remove the extra copy of things which appeared twice.

Reviewed-on: https://gerrit.openafs.org/13057
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Anders Kaseorg <andersk@mit.edu>
Tested-by: Anders Kaseorg <andersk@mit.edu>
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
(cherry picked from commit b48fe6b57f13bacb368e27389ccd3f9c279822da)

Change-Id: I322967df048cb49d270cc149d6b710a38797cbbf
Reviewed-on: https://gerrit.openafs.org/13144
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>