net/x25: remove x25_kill_by_device()

Remove obsolete function x25_kill_by_device(). It's not used any more.
Signed-off-by: NMartin Schiller <ms@dev.tdt.de>
Signed-off-by: NJakub Kicinski <kuba@kernel.org>

net/x25/af_x25.c

@@ -199,22 +199,6 @@ static void x25_remove_socket(struct sock *sk)
 	write_unlock_bh(&x25_list_lock);
 }
 
-/*
- *	Kill all bound sockets on a dropped device.
- */
-static void x25_kill_by_device(struct net_device *dev)
-{
-	struct sock *s;
-
-	write_lock_bh(&x25_list_lock);
-
-	sk_for_each(s, &x25_list)
-		if (x25_sk(s)->neighbour && x25_sk(s)->neighbour->dev == dev)
-			x25_disconnect(s, ENETUNREACH, 0, 0);
-
-	write_unlock_bh(&x25_list_lock);
-}
-
 /*
  *	Handle device status changes.
  */