disable-litespeed-cache-comment.php

<?php
/**
 * Disable LiteSpeed Cache Comment plugin bootstrap.
 *
 * @package   Disable_LiteSpeed_Cache_Comment
 * @author    Weston Ruter, Google
 * @license   GPL-2.0-or-later
 * @copyright 2020 Google Inc.
 *
 * @wordpress-plugin
 * Plugin Name: Disable LiteSpeed Cache Comment
 * Plugin URI:  https://gist.github.com/westonruter/e588bd4ed1778799b19417c838eb5e5e
 * Description: This is needed on sites using the AMP plugin because LiteSpeed Cache by default injects an HTML comment at the end of JSON responses which breaks AMP validation requests.
 * Version:     0.2
 * 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( 'litespeed_comment', '__return_false' );
if ( ! defined( 'LSCACHE_ESI_SILENCE' ) ) {
	define( 'LSCACHE_ESI_SILENCE', true );
}

Installation instructions: https://gist.github.com/westonruter/6110fbc4bef0c4b8c021a112012f7e9c

Hi Tried to install the zip but Wordpress is giving error
The package could not be installed. No valid plugins were found.

Plugin installation failed.

Return to Plugin Installer

You can instead just download this file and put it into your wp-content/plugins directory.

Even its Not working ....

It looks like this removed this line:-

<!-- Page generated by LiteSpeed Cache 3.2.1 on 2020-06-10 01:42:36 -->

But not this line:-

<!-- Page optimized by LiteSpeed Cache @2020-06-09 17:42:37 -->

UPDATE: Adding the following will remove the Page Optimized by comment:-

define( 'LSCACHE_ESI_SILENCE', true );

Thanks, I've updated the plugin to define that constant.

Note that this plugin should no longer be necessary once 1.6 is released, as the plugin will proactively strip such comments as of ampproject/amp-wp#4679.