ASoC: 88pm860x: Drop empty platform remove function

A remove callback just returning 0 is equivalent to no remove callback
at all. So drop the useless function.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20221212205406.3771071-6-u.kleine-koenig@pengutronix.deSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/88pm860x-codec.c

@@ -1386,17 +1386,11 @@ static int pm860x_codec_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int pm860x_codec_remove(struct platform_device *pdev)
-{
-	return 0;
-}
-
 static struct platform_driver pm860x_codec_driver = {
 	.driver	= {
 		.name	= "88pm860x-codec",
 	},
 	.probe	= pm860x_codec_probe,
-	.remove	= pm860x_codec_remove,
 };
 
 module_platform_driver(pm860x_codec_driver);