ASoC: da732x: Drop no-op remove function

A remove callback that just returns 0 is equivalent to no callback at all
as can be seen in i2c_device_remove(). So simplify accordingly.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20220603140513.131142-5-u.kleine-koenig@pengutronix.deSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/da732x.c

@@ -1546,11 +1546,6 @@ static int da732x_i2c_probe(struct i2c_client *i2c)
 	return ret;
 }
 
-static int da732x_i2c_remove(struct i2c_client *client)
-{
-	return 0;
-}
-
 static const struct i2c_device_id da732x_i2c_id[] = {
 	{ "da7320", 0},
 	{ }
@@ -1562,7 +1557,6 @@ static struct i2c_driver da732x_i2c_driver = {
 		.name	= "da7320",
 	},
 	.probe_new	= da732x_i2c_probe,
-	.remove		= da732x_i2c_remove,
 	.id_table	= da732x_i2c_id,
 };