staging: wilc1000: remove unused variable real_ndev

This patch removes unused variable real_ndev.
Signed-off-by: Glen Lee <glen.lee@atmel.com>
Signed-off-by: Tony Cho <tony.cho@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wilc1000/wilc_wfi_netdevice.h

@@ -187,7 +187,6 @@ typedef struct {
 
 	const struct firmware *wilc_firmware;
 
-	struct net_device *real_ndev;
 #ifdef WILC_SDIO
 	struct sdio_func *wilc_sdio_func;
 #else