net: Remove unlikely() for WARN_ON() conditions

No need for the unlikely(), WARN_ON() and BUG_ON() internally use
unlikely() on the condition.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/dev.c b/net/core/dev.c
index e1b7cfa..b370230 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2326,7 +2326,7 @@
 	 */
 	if (type == htons(ETH_P_8021Q) || type == htons(ETH_P_8021AD)) {
 		if (vlan_depth) {
-			if (unlikely(WARN_ON(vlan_depth < VLAN_HLEN)))
+			if (WARN_ON(vlan_depth < VLAN_HLEN))
 				return 0;
 			vlan_depth -= VLAN_HLEN;
 		} else {