drm: remove unreachable code in drm_sysfs.c

This code was never going to get called in there.
Signed-off-by: Jonas Bonn <jonas@southpole.se>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/drm_sysfs.c

@@ -489,9 +489,7 @@ int drm_sysfs_device_add(struct drm_minor *minor)
 
 	return 0;
 
-	device_unregister(&minor->kdev);
 err_out:
-
 	return err;
 }