[NEIGH]: Remove unused method from include/net/neighbour.h

Signed-off-by: Rami Rosen <ramirose@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/neighbour.h

@@ -292,10 +292,6 @@ static inline int neigh_is_connected(struct neighbour *neigh)
 	return neigh->nud_state&NUD_CONNECTED;
 }
 
-static inline int neigh_is_valid(struct neighbour *neigh)
-{
-	return neigh->nud_state&NUD_VALID;
-}
 
 static inline int neigh_event_send(struct neighbour *neigh, struct sk_buff *skb)
 {