staging: greybus: arche: 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 (mostly) ignored
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.

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/20230403154014.2564054-6-u.kleine-koenig@pengutronix.deSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/greybus/arche-platform.c

@@ -559,7 +559,7 @@ static int arche_remove_child(struct device *dev, void *unused)
 	return 0;
 }
 
-static int arche_platform_remove(struct platform_device *pdev)
+static void arche_platform_remove(struct platform_device *pdev)
 {
 	struct arche_platform_drvdata *arche_pdata = platform_get_drvdata(pdev);
 
@@ -570,8 +570,6 @@ static int arche_platform_remove(struct platform_device *pdev)
 
 	if (usb3613_hub_mode_ctrl(false))
 		dev_warn(arche_pdata->dev, "failed to control hub device\n");
-		/* TODO: Should we do anything more here ?? */
-	return 0;
 }
 
 static __maybe_unused int arche_platform_suspend(struct device *dev)
@@ -631,7 +629,7 @@ MODULE_DEVICE_TABLE(of, arche_combined_id);
 
 static struct platform_driver arche_platform_device_driver = {
 	.probe		= arche_platform_probe,
-	.remove		= arche_platform_remove,
+	.remove_new	= arche_platform_remove,
 	.shutdown	= arche_platform_shutdown,
 	.driver		= {
 		.name	= "arche-platform-ctrl",