yes it does work i just did it and it cleared out pics i didnt want on there.. thank you.
1. From a home screen, tap the Application drawer ➔ Settings ➔ Application manager.
2. Tap the All tab to view a list of all the installed applications on your device.
3. Look for Gallery, tap on it.
4. Tap on Clear Data. That should remove all the instant upload images from your device.