/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
/**
 * Delete an output directory, but error out if it's the root of the project.
 */
export declare function deleteOutputDir(root: string, outputPath: string): void;