ASoC: atmel-pdmic: 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>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20221212205406.3771071-5-u.kleine-koenig@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/atmel/atmel-pdmic.c

@@ -692,11 +692,6 @@ unregister_codec:
 	return ret;
 }
 
-static int atmel_pdmic_remove(struct platform_device *pdev)
-{
-	return 0;
-}
-
 static struct platform_driver atmel_pdmic_driver = {
 	.driver	= {
 		.name		= "atmel-pdmic",
@@ -704,7 +699,6 @@ static struct platform_driver atmel_pdmic_driver = {
 		.pm		= &snd_soc_pm_ops,
 	},
 	.probe	= atmel_pdmic_probe,
-	.remove	= atmel_pdmic_remove,
 };
 module_platform_driver(atmel_pdmic_driver);