bonding: trivial: remove outdated comment and braces

We don't have to release all slaves when closing the bond dev, so remove
the outdated comment and the braces around the left single statement.
Signed-off-by: Nikolay Aleksandrov <nikolay@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/bonding/bond_main.c

@@ -3210,12 +3210,8 @@ static int bond_close(struct net_device *bond_dev)
 
 	bond_work_cancel_all(bond);
 	bond->send_peer_notif = 0;
-	if (bond_is_lb(bond)) {
-		/* Must be called only after all
-		 * slaves have been released
-		 */
+	if (bond_is_lb(bond))
 		bond_alb_deinitialize(bond);
-	}
 	bond->recv_probe = NULL;
 
 	return 0;