[WordPress][WP Rocket] Remove Cache Options meta box from Edit screens.

wp-rocket-remove-cache-options-meta-box.php

<?php
/**
 * PLEASE SEE COMMENT BELOW:
 * https://gist.github.com/glueckpress/0fcd12a8ada43e37e400facd987016a1#gistcomment-3009533
 */
defined( 'ABSPATH' ) or die();
/**
 * Plugin Name: WP Rocket | Remove Cache Options Meta Boxx
 * Description: Removes the Cache Options meta box from Edit screens.
 * Author:      Caspar Hübinger
 * Author URI:  https://profiles.wordpress.org/glueckpress
 * License:     GNU General Public License v3 or later
 * License URI: http://www.gnu.org/licenses/gpl-3.0.html
 */
add_action( 'wp_rocket_loaded', function () {
	remove_action( 'add_meta_boxes', 'rocket_cache_options_meta_boxes' );
});

This doesn't work anymore (since version 3.15), so this is an alternative:
add_filter( 'rocket_metabox_options_post_types', '__return_empty_array' );
It indicates that you want the metabox to be shown on 0 post types.