maple: remove unused variable

Remove an unused variable from the definition of struct maple_device
Signed-off-by: Adrian McMenamin <adrian@mcmen.demon.co.uk>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

include/linux/maple.h

@@ -64,7 +64,6 @@ struct maple_driver {
 	int (*connect) (struct maple_device * dev);
 	void (*disconnect) (struct maple_device * dev);
 	struct device_driver drv;
-	int registered;
 };
 
 void maple_getcond_callback(struct maple_device *dev,