zorro: Simplify 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_zorro_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/zorro/zorro-driver.c

···
 	struct zorro_dev *z = to_zorro_dev(dev);
 	struct zorro_driver *drv = to_zorro_driver(dev->driver);
 
-	if (drv) {
-		if (drv->remove)
-			drv->remove(z);
-		z->driver = NULL;
-	}
+	if (drv->remove)
+		drv->remove(z);
+	z->driver = NULL;
 }