platform/x86: samsung-laptop: Drop duplicate check for led_classdev_unregister()

led_classdev_unregister() already has the very same check, so,
drop a duplicate in the driver.

Signed-off-by: Andy Shevchenko <[e-mail]>

drivers/platform/x86/samsung-laptop.c

···
 
 static void samsung_leds_exit(struct samsung_laptop *samsung)
 {
-	if (!IS_ERR_OR_NULL(samsung->kbd_led.dev))
-		led_classdev_unregister(&samsung->kbd_led);
+	led_classdev_unregister(&samsung->kbd_led);
 	if (samsung->led_workqueue)
 		destroy_workqueue(samsung->led_workqueue);
 }