tcp: remove unnecessary tcp_sk assignment.

This variable is overwritten by the child socket assignment before
it ever gets used.
Signed-off-by: NDave Jones <davej@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/tcp_fastopen.c

@@ -131,7 +131,7 @@ static bool tcp_fastopen_create_child(struct sock *sk,
 				      struct dst_entry *dst,
 				      struct request_sock *req)
 {
-	struct tcp_sock *tp = tcp_sk(sk);
+	struct tcp_sock *tp;
 	struct request_sock_queue *queue = &inet_csk(sk)->icsk_accept_queue;
 	struct sock *child;