amp-suppress-non-admin-validation-error-warnings.php

<?php
/**
 * Plugin Name: AMP Suppress Non-Admin Validation Error Warnings
 *
 * @package   AMP_Suppress_Non_Admin_Validation_Error_Warnings
 * @author    Weston Ruter, Google
 * @license   GPL-2.0-or-later
 * @copyright 2019 Google Inc.
 *
 * @wordpress-plugin
 * Plugin Name: AMP Suppress Non-Admin Validation Error Warnings
 * Description: Suppress AMP Validation Error Warnings for Non-Admin Users. This is somewhat of a brute force approach, as it will not log any of the validation errors in the validated URL screen for non-admin users; when an admin user re-saves the post, then the validation errors would show up.
 * Version:     0.1.0
 * Author:      Weston Ruter, Google
 * Author URI:  https://weston.ruter.net/
 * License:     GNU General Public License v2 (or later)
 * License URI: http://www.gnu.org/licenses/gpl-2.0.html
 */

add_filter(
	'amp_validation_error_sanitized',
	function( $sanitized ) {
		if ( ! current_user_can( 'manage_options' ) ) {
			$sanitized = true;
		}
		return $sanitized;
	}
);

Alternative approach which also enables asynchronous validation: https://gist.github.com/westonruter/31ac0e056b8b1278c98f8a9f548fcc1a