ath5k: remove unused led_off parameter

ath5k_softc->led_off hasn't been used since commit
3a078876caee9634dbb9b41e6269262e30e8b535, "convert LED code to use
mac80211 triggers."

Changes-licensed-under: 3-Clause-BSD

Reported-by: Tobias Doerffel <tobias.doerffel@gmail.com>
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Acked-by: Nick Kossifidis <mickflemm@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath5k/base.h

@@ -148,8 +148,7 @@ struct ath5k_softc {
 	u8			bssidmask[ETH_ALEN];
 
 	unsigned int		led_pin,	/* GPIO pin for driving LED */
-				led_on,		/* pin setting for LED on */
-				led_off;	/* off time for current blink */
+				led_on;		/* pin setting for LED on */
 
 	struct tasklet_struct	restq;		/* reset tasklet */