smbd: Factor out remove_lease_if_stale()

smbd: Factor out remove_lease_if_stale()

remove_lease_if_stale() does not have the check

		if (e == e2) {
			/* Not ourselves. */
			continue;
		}

that remove_share_mode_lease() had. However, remove_share_mode_lease()
has already set e->op_type=NO_OPLOCK, so that the

		if (e->op_type != LEASE_OPLOCK) {
			continue;
		}

statement has the same effect.

Why? The next commit will need it for proper error path cleanup.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>