src/vs/platform/localizations/node/localizations.ts/LocalizationsService/onDidUninstallExtension
class LocalizationsService:	private onDidUninstallExtension(identifier: IExtensionIdentifier): void {
		this.cache.getLanguagePacks()
			.then(languagePacks => {
				if (Object.keys(languagePacks).some(language => languagePacks[language] && languagePacks[language].extensions.some(e => areSameExtensions(e.extensionIdentifier, identifier)))) {
					this.logService.debug('Removing language packs from the extension', identifier.id);
					this.update().then(changed => { if (changed) { this._onDidLanguagesChange.fire(); } });
				}
			});
	}