tcp: remove unnecessary assignment.

This variable i is overwritten to 0 by following code

Signed-off-by: Li RongQing <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

net/ipv4/tcp_fastopen.c

···
 
 		if (__tcp_fastopen_cookie_gen(&ip6h->saddr, &tmp)) {
 			struct in6_addr *buf = (struct in6_addr *) tmp.val;
-			int i = 4;
+			int i;
 
 			for (i = 0; i < 4; i++)
 				buf->s6_addr32[i] ^= ip6h->daddr.s6_addr32[i];