[TCP]: Trivial tcp_data_queue() cleanup

This patch removes a superfluous intialization from tcp_data_queue().

Signed-off-by: James Morris <jmorris@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 2504927..6984042 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -3517,7 +3517,6 @@
 	if (TCP_SKB_CB(skb)->seq == TCP_SKB_CB(skb)->end_seq)
 		goto drop;
 
-	th = skb->h.th;
 	__skb_pull(skb, th->doff*4);
 
 	TCP_ECN_accept_cwr(tp, skb);