ath9k: remove unused function ath9k_hw_keyisvalid

Reported-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/hw.c

@@ -1737,17 +1737,6 @@ bool ath9k_hw_set_keycache_entry(struct ath_hw *ah, u16 entry,
 }
 EXPORT_SYMBOL(ath9k_hw_set_keycache_entry);
 
-bool ath9k_hw_keyisvalid(struct ath_hw *ah, u16 entry)
-{
-	if (entry < ah->caps.keycache_size) {
-		u32 val = REG_READ(ah, AR_KEYTABLE_MAC1(entry));
-		if (val & AR_KEYTABLE_VALID)
-			return true;
-	}
-	return false;
-}
-EXPORT_SYMBOL(ath9k_hw_keyisvalid);
-
 /******************************/
 /* Power Management (Chipset) */
 /******************************/

drivers/net/wireless/ath/ath9k/hw.h

@@ -863,7 +863,6 @@ bool ath9k_hw_keysetmac(struct ath_hw *ah, u16 entry, const u8 *mac);
 bool ath9k_hw_set_keycache_entry(struct ath_hw *ah, u16 entry,
 				 const struct ath9k_keyval *k,
 				 const u8 *mac);
-bool ath9k_hw_keyisvalid(struct ath_hw *ah, u16 entry);
 
 /* GPIO / RFKILL / Antennae */
 void ath9k_hw_cfg_gpio_input(struct ath_hw *ah, u32 gpio);