net: ipv4: drop unneeded likely() call around IS_ERR()

IS_ERR() already calls unlikely(), so this extra unlikely() call
around IS_ERR() is not needed.

Signed-off-by: Enrico Weigelt <info@metux.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 8fb250e..f40059b 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -483,7 +483,7 @@ struct sock *__udp4_lib_lookup(struct net *net, __be32 saddr,
 					  htonl(INADDR_ANY), hnum, dif, sdif,
 					  exact_dif, hslot2, skb);
 	}
-	if (unlikely(IS_ERR(result)))
+	if (IS_ERR(result))
 		return NULL;
 	return result;
 }