drivers/rtc/rtc-au1xxx.c: remove empty function

After the switch to devm_ functions and the removal of
rtc_device_unregister(), the 'remove' function does not do anything.
Delete it.

Signed-off-by: Sachin Kamat <[e-mail]>
Cc: Manuel Lauss <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/rtc/rtc-au1xxx.c

···
 	return ret;
 }
 
-static int au1xtoy_rtc_remove(struct platform_device *pdev)
-{
-	return 0;
-}
-
 static struct platform_driver au1xrtc_driver = {
 	.driver		= {
 		.name	= "rtc-au1xxx",
 		.owner	= THIS_MODULE,
 	},
-	.remove		= au1xtoy_rtc_remove,
 };
 
 module_platform_driver_probe(au1xrtc_driver, au1xtoy_rtc_probe);