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LocaleConfigManager provides methods to remove configuration translation overrides when modules are uninstalled. Namely deleteComponentTranslations() which uses a local deleteTranslationData() method. However, when modules are uninstalled, their configuration is removed already and LanguageConfigFactoryOverride::onConfigDelete covers that case, so needing to look up which original files belonged to the given module and attempting to remove their language overrides is double work. When the config files are removed, their overrides vanish as well.
Remove the extra unneeded code.
User interface changes
Public methods LocaleConfigManager::deleteComponentTranslations() and deleteTranslationData() removed. However, deleteTranslationData() was a very thin wrapper on deleting the language override itself, which is possible by loading the language override from the language manager and deleting: