[PATCH] libertas: remove adapter->adhoc_grate_enabled

The variable was initialized with 0 (false). There is no code that would
ever change it, so we can use the false-patch directly.

Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/libertas/dev.h

@@ -281,8 +281,6 @@ struct _wlan_adapter {
 
 	u16 enablehwauto;
 	u16 ratebitmap;
-	/** control G rates */
-	u8 adhoc_grate_enabled;
 
 	u32 fragthsd;
 	u32 rtsthsd;