orinoco_usb: remove redundant pointer dev

The pointer dev is assigned but never read, hence it is redundant
and can be removed. Cleans up clang warning:

drivers/net/wireless/intersil/orinoco/orinoco_usb.c:1468:2: warning:
Value stored to 'dev' is never read
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/intersil/orinoco/orinoco_usb.c

@@ -1457,7 +1457,6 @@ static void ezusb_bulk_in_callback(struct urb *urb)
 
 static inline void ezusb_delete(struct ezusb_priv *upriv)
 {
-	struct net_device *dev;
 	struct list_head *item;
 	struct list_head *tmp_item;
 	unsigned long flags;
@@ -1465,7 +1464,6 @@ static inline void ezusb_delete(struct ezusb_priv *upriv)
 	BUG_ON(in_interrupt());
 	BUG_ON(!upriv);
 
-	dev = upriv->dev;
 	mutex_lock(&upriv->mtx);
 
 	upriv->udev = NULL;	/* No timer will be rearmed from here */