sh: superhyway: Simplify check in remove callback

The driver core only calls a remove callback when the device was
successfully bound (aka probed) before. So dev->driver is never NULL.

(And even if it was NULL, to_superhyway_driver(NULL) isn't ...)

Signed-off-by: Uwe Kleine-König <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/sh/superhyway/superhyway.c

···
 	struct superhyway_device *shyway_dev = to_superhyway_device(dev);
 	struct superhyway_driver *shyway_drv = to_superhyway_driver(dev->driver);
 
-	if (shyway_drv && shyway_drv->remove)
+	if (shyway_drv->remove)
 		shyway_drv->remove(shyway_dev);
 }