Manual:NukeNS.php

Details
nukeNS.php file is a maint-scripts>Special:MyLanguage/Manual:Maintenance scripts|maintenance script to remove all pages with only one revision (by default) from the MediaWiki , without flooding recent>Special:MyLanguage/Help:recent changes|recent changes, deletion logs, etc.

It has originally been added to remove the content of unchanged interface texts from the MediaWiki namespace, but it can be used to basically delete all pages from any namespace.