ipasdv4/tcp_ipv4: remove redundant assignment

The value of 'st->state' has been verified as "TCP_SEQ_STATE_LISTENING",
it's unnecessary to assign TCP_SEQ_STATE_LISTENING to it, so we can remove it.
Signed-off-by: Nxu xin <xu.xin16@zte.com.cn>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/tcp_ipv4.c

@@ -2480,7 +2480,6 @@ static void *tcp_seek_last_pos(struct seq_file *seq)
 	case TCP_SEQ_STATE_LISTENING:
 		if (st->bucket > hinfo->lhash2_mask)
 			break;
-		st->state = TCP_SEQ_STATE_LISTENING;
 		rc = listening_get_first(seq);
 		while (offset-- && rc && bucket == st->bucket)
 			rc = listening_get_next(seq, rc);