You can use CCleaner's Uninstall feature to uninstall the apps that are built into Windows 8, 8.1 and 10.
To do this, open CCleaner and click Tools > Uninstall. You will find a list of all the applications installed on your computer, which includes these built in apps. Simply select the app you wish to remove, and click Uninstall on the right. CCleaner will then uninstall the app for you.