hwmon: (pc87427) Convert to platform remove callback returning void

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart
from emitting a warning) and this typically results in resource leaks.
To improve here there is a quest to make the remove callback return
void. In the first step of this quest all drivers are converted to
.remove_new() which already returns void. Eventually after all drivers
are converted, .remove_new() is renamed to .remove().

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20230918085951.1234172-14-u.kleine-koenig@pengutronix.deSigned-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/pc87427.c

@@ -1115,14 +1115,12 @@ static int pc87427_probe(struct platform_device *pdev)
 	return err;
 }
 
-static int pc87427_remove(struct platform_device *pdev)
+static void pc87427_remove(struct platform_device *pdev)
 {
 	struct pc87427_data *data = platform_get_drvdata(pdev);
 
 	hwmon_device_unregister(data->hwmon_dev);
 	pc87427_remove_files(&pdev->dev);
-
-	return 0;
 }
 
 
@@ -1131,7 +1129,7 @@ static struct platform_driver pc87427_driver = {
 		.name	= DRVNAME,
 	},
 	.probe		= pc87427_probe,
-	.remove		= pc87427_remove,
+	.remove_new	= pc87427_remove,
 };
 
 static int __init pc87427_device_add(const struct pc87427_sio_data *sio_data)