mac80211: remove unneed variable from ieee80211_tx_pending()

We don't need "sdata" any more after:
	d84f323477260e773d5317ad7cbe50f76115cb47
	mac80211: remove dev_hold/put calls

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index cbe53ed..08e1f17 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -2010,14 +2010,12 @@
 		while (!skb_queue_empty(&local->pending[i])) {
 			struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
 			struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
-			struct ieee80211_sub_if_data *sdata;
 
 			if (WARN_ON(!info->control.vif)) {
 				kfree_skb(skb);
 				continue;
 			}
 
-			sdata = vif_to_sdata(info->control.vif);
 			spin_unlock_irqrestore(&local->queue_stop_reason_lock,
 						flags);