netfilter: bridge-netfilter: update a comment in br_forward.c about ip_fragment()

ip_refrag isn't used anymore in the bridge-netfilter code
Signed-off-by: Bart De Schuymer <bdschuym@pandora.be>
Signed-off-by: Patrick McHardy <kaber@trash.net>

net/bridge/br_forward.c

@@ -43,7 +43,7 @@ int br_dev_queue_push_xmit(struct sk_buff *skb)
 	if (packet_length(skb) > skb->dev->mtu && !skb_is_gso(skb))
 		kfree_skb(skb);
 	else {
-		/* ip_refrag calls ip_fragment, doesn't copy the MAC header. */
+		/* ip_fragment doesn't copy the MAC header */
 		if (nf_bridge_maybe_copy_header(skb))
 			kfree_skb(skb);
 		else {