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>
        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);