The following messages aren't used anymore since Pywikibot 7.0; I guess they can be removed after a delay with Pywikibot 9 but this can break some functionality for older Pywikibot releases. Unfortunately there is no way to implement a deprecation warning for older releases.
| i18n message key | reason | behavior on Pywkibot 6 or below if message is removed |
| cosmetic_changes-append | replaced by pywikibot-cosmetic-changes | fallback in BasePage._cosmetic_changes_hook() to hardcoded '; cosmetic changes' |
| category_redirect-log-move-error | message was removed | CategoryRedirectBot.run() raises TranslationError in very rare cases because either CategoryRedirectBot.move_contents() should not fail and data.api handles any known exception or an uncatched exception is explicitly wanted. |