hci_usb: remove code obfuscation

_urb_free is an alias for kfree... making code longer & harder to
read. Remove it.

Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/bluetooth/hci_usb.h

@@ -60,11 +60,6 @@ struct _urb {
 	struct urb        urb;
 };
 
-static inline void _urb_free(struct _urb *_urb)
-{
-	kfree(_urb);
-}
-
 static inline void _urb_queue_init(struct _urb_queue *q)
 {
 	INIT_LIST_HEAD(&q->head);