This is not for uninstalling the games but should remove the games link from start menu. 1st you need to open the Control Panel from start menu. Then select Programs and Features, you should see Turn Windows Future On or Off at the left side. Uncheck the Games folder to uninstall all games, or expand Games and uncheck the games you want to uninstall, and then click OK. That should remove the Games Link on the start menu.
Try it, thanks.