one-click-wordpress-installer/app/plugins/wordpress-seo/admin/metabox/class-metabox-null-tab.php

<?php
/**
 * WPSEO plugin file.
 *
 * @package WPSEO\Admin
 */

/**
 * Generates the HTML for a metabox tab.
 */
class WPSEO_Metabox_Null_Tab implements WPSEO_Metabox_Tab {

	/**
	 * Returns the html for the tab link.
	 *
	 * @return string|null
	 */
	public function link() {
		return null;
	}

	/**
	 * Returns the html for the tab content.
	 *
	 * @return string|null
	 */
	public function content() {
		return null;
	}
}