Removing the feature flag created in T377453:
- $wgTemplateDataEnableDiscovery
- $wgTemplateDataEnableCategoryBrowser
- $wgTemplateDataEnableFeaturedTemplates
This will involved deleting the feature flags and all their conditionals everywhere in TemplateData, MediaWiki-extensions-TemplateWizard, and VisualEditor.
Note also that the module loading for VE will need to be moved from where it currently is in VE to the extension.json of TemplateData as a plugin module (example patch for that).