ceph: remove redundant assignment

There is redundant assighment of variable i in
ceph_mdsmap_get_random_mds(), just remvoe it.
Signed-off-by: NChengguang Xu <cgxu519@gmx.com>
Signed-off-by: NIlya Dryomov <idryomov@gmail.com>

fs/ceph/mdsmap.c

@@ -35,7 +35,6 @@ int ceph_mdsmap_get_random_mds(struct ceph_mdsmap *m)
 
 	/* pick */
 	n = prandom_u32() % n;
-	i = 0;
 	for (i = 0; n > 0; i++, n--)
 		while (m->m_info[i].state <= 0)
 			i++;