net: Really remove all of LOOPBACK_TSO code.

As noticed by Saikiran Madugula, commit 7447ef63
("loopback: Remove rest of LOOPBACK_TSO code.") got rid of
emulate_large_send_offload() but didn't get rid of the call
site as well.
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/loopback.c

@@ -76,15 +76,6 @@ static int loopback_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	skb->protocol = eth_type_trans(skb,dev);
 
-#ifdef LOOPBACK_TSO
-	if (skb_is_gso(skb)) {
-		BUG_ON(skb->protocol != htons(ETH_P_IP));
-		BUG_ON(ip_hdr(skb)->protocol != IPPROTO_TCP);
-
-		emulate_large_send_offload(skb);
-		return 0;
-	}
-#endif
 	dev->last_rx = jiffies;
 
 	/* it's OK to use per_cpu_ptr() because BHs are off */