Disable an existing page that is not directly related to a case flow, so that users cannot add it to any menus. A page that has been removed from an application is no longer available in the Pages menu.
The resources the page contained persist and you can still use them in an application. You can access the inactive page through the Relevant records menu in Dev Studio. For more information, see Understanding relevant records.
In the navigation pane of App Studio, click Pages.
Hover over the page name and click More.
Click Remove page.