net_sched: sfq: remove unused macro

not used anymore since ddecf0f
(net_sched: sfq: add optional RED on top of SFQ).

Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/sch_sfq.c b/net/sched/sch_sfq.c
index 1af2f73..211db90 100644
--- a/net/sched/sch_sfq.c
+++ b/net/sched/sch_sfq.c
@@ -310,11 +310,6 @@
 	slot->skblist_prev = skb;
 }
 
-#define	slot_queue_walk(slot, skb)		\
-	for (skb = slot->skblist_next;		\
-	     skb != (struct sk_buff *)slot;	\
-	     skb = skb->next)
-
 static unsigned int sfq_drop(struct Qdisc *sch)
 {
 	struct sfq_sched_data *q = qdisc_priv(sch);