Published pages can be removed either through the Composition editor in a project, or by Deleting the Page through the Drive View.
Unpublishing a Page
Pages can be unpublished from within the Project editor by clicking on the ✓ Publish button in the top-right corner of the script then clicking the Unpublish button at the bottom. You will be prompted to confirm the action by clicking Delete Publish at which point the page will be deleted and the published page URL will cease to function.
