Board Thread:In-Editor Help Assistance/@comment-44515592-20191210032216/@comment-9605025-20191210042206

The "tab" containing the deletion notice cannot be removed. It is automatically added to the page content when attempting to view a deleted page. This is done so that users can see that the page was deleted as opposed to having not been created in the first place. If you want the content restored, talk to the user that deleted it (SpaceshipEarth); you can't do it yourself. If you want to use the page name but plan on providing different content, then you can just create the page like you would any other. Once your new version is published, the deletion notice will no longer display.

Whether you want the previous content restored or to start from scratch, I would suggest talking to the user that deleted the page. From their comment, it seems that it was removed because they considered it off-topic.