media: i2c: drop check because i2c_unregister_device() is NULL safe

No need to check the argument of i2c_unregister_device() because the
function itself does it.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

drivers/media/i2c/rdacm20.c

@@ -625,8 +625,7 @@ static int rdacm20_probe(struct i2c_client *client)
 	v4l2_ctrl_handler_free(&dev->ctrls);
 error:
 	media_entity_cleanup(&dev->sd.entity);
-	if (dev->sensor)
-		i2c_unregister_device(dev->sensor);
+	i2c_unregister_device(dev->sensor);
 
 	dev_err(&client->dev, "probe failed\n");