extensions/git/src/commands.ts/CommandCenter/_cleanUntrackedChanges
class CommandCenter:	private async _cleanUntrackedChanges(repository: Repository, resources: Resource[]): Promise<void> {
		const message = localize('confirm delete multiple', "Are you sure you want to DELETE {0} files?\nThis is IRREVERSIBLE!\nThese files will be FOREVER LOST if you proceed.", resources.length);
		const yes = localize('delete files', "Delete Files");
		const pick = await window.showWarningMessage(message, { modal: true }, yes);

		if (pick !== yes) {
			return;
		}

		await repository.clean(resources.map(r => r.resourceUri));
	}