ACPI: APEI: Drop unsetting driver data on remove

Since commit 0998d063 ("device-core: Ensure drvdata = NULL when no
driver is bound") the driver core cares for cleaning driver data, so
don't do it in the driver, too.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/apei/ghes.c

@@ -1444,8 +1444,6 @@ static int ghes_remove(struct platform_device *ghes_dev)
 
 	kfree(ghes);
 
-	platform_set_drvdata(ghes_dev, NULL);
-
 	return 0;
 }