ceph-osd: remove extra close of stderr

Otherwise, one loses log messages when running with -f or -d.  When
daemonizing, stderr is already closed in global_init_postfork_finish.

Fixes: #10010, #10113, #9810

Signed-off-by: Dan Mick <dan.mick@redhat.com>
Merge pull request #3120 from ceph/wip-10010

ceph-osd: don't close stderr if not daemonizing

Reviewed-by: Sage Weil <sage@redhat.com>
Reviewed-by: Loic Dachary <ldachary@redhat.com>