rt2x00: Remove useless NULL check

Since tx_info->control.vif was already accessed before it cant't be NULL
here.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rt2x00/rt2x00queue.c b/drivers/net/wireless/rt2x00/rt2x00queue.c
index bf9bba3..b32ca31 100644
--- a/drivers/net/wireless/rt2x00/rt2x00queue.c
+++ b/drivers/net/wireless/rt2x00/rt2x00queue.c
@@ -221,8 +221,7 @@
 	struct rt2x00_intf *intf = vif_to_intf(tx_info->control.vif);
 	unsigned long irqflags;
 
-	if (!(tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) ||
-	    unlikely(!tx_info->control.vif))
+	if (!(tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ))
 		return;
 
 	/*