Change Details

**Reason**: Not deployed anywhere based on Wikiapiary No code update for 4 years beside the routine maintenances - [ - [x] Archive documentation on `mediawiki.org` https://www.mediawiki.org/wiki/Extension:Semantic_Sifter - [ ] Remove from `mediawiki/extensions` ( along with in `.gitmodules`) - [x] Remove tests in `integration/config` ( `zuul/layout.yaml` ) - [ ] Remove from `translatewiki` ( `groups/MediaWiki/mediawiki-extensions.txt` ) - [ ] Empty repository and add a OBSOLETE file. - [ ] Archive the extension's diffusion repository: rESSI - [ ] Mark the repository read-only in Gerrit: https://gerrit.wikimedia.org/r/#/admin/projects/mediawiki/extensions/SemanticSifter - [ ] Delete the GitHub mirror: https://github.com/wikimedia/mediawiki-extensions-SemanticSifter