pkt_sched: fq: remove useless TIME_WAIT check

TIME_WAIT sockets are not owning any skb.

ip_send_unicast_reply() and tcp_v6_send_response() both use
regular sockets.

We can safely remove a test in sch_fq and save one cache line miss,
as sk_state is far away from sk_pacing_rate.

Tested at Google for about one year.
Signed-off-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/sched/sch_fq.c

 /*
  * net/sched/sch_fq.c Fair Queue Packet Scheduler (per flow pacing)
  *
- *  Copyright (C) 2013 Eric Dumazet <edumazet@google.com>
+ *  Copyright (C) 2013-2015 Eric Dumazet <edumazet@google.com>
  *
  *	This program is free software; you can redistribute it and/or
  *	modify it under the terms of the GNU General Public License
@@ -471,7 +471,7 @@ static struct sk_buff *fq_dequeue(struct Qdisc *sch)
 		goto out;
 
 	rate = q->flow_max_rate;
-	if (skb->sk && skb->sk->sk_state != TCP_TIME_WAIT)
+	if (skb->sk)
 		rate = min(skb->sk->sk_pacing_rate, rate);
 
 	if (rate != ~0U) {