ceph: remove unused CEPH_MDS_LEASE_RELEASE related code

The ceph_mdsc_lease_release() has been removed by commit 8aa152c7
(ceph: remove ceph_mdsc_lease_release). ceph_mdsc_lease_send_msg will
never be called with CEPH_MDS_LEASE_RELEASE.
Signed-off-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

fs/ceph/mds_client.c

@@ -4396,12 +4396,6 @@ void ceph_mdsc_lease_send_msg(struct ceph_mds_session *session,
 	memcpy((void *)(lease + 1) + 4,
 	       dentry->d_name.name, dentry->d_name.len);
 	spin_unlock(&dentry->d_lock);
-	/*
-	 * if this is a preemptive lease RELEASE, no need to
-	 * flush request stream, since the actual request will
-	 * soon follow.
-	 */
-	msg->more_to_follow = (action == CEPH_MDS_LEASE_RELEASE);
 
 	ceph_con_send(&session->s_con, msg);
 }