src/vs/platform/localizations/node/localizations.ts/LocalizationsService/postUninstallExtension
class LocalizationsService:	private async postUninstallExtension(extension: ILocalExtension): Promise<void> {
		const languagePacks = await this.cache.getLanguagePacks();
		if (Object.keys(languagePacks).some(language => languagePacks[language] && languagePacks[language].extensions.some(e => areSameExtensions(e.extensionIdentifier, extension.identifier)))) {
			this.logService.info('Removing language packs from the extension', extension.identifier.id);
			await this.update();
		}
	}