Enabling White Label
White Label lets you remove all mentions of WP Rocket. It's pretty easy to set up.
By default, the White Label option is hidden. To display it, edit wp-config.php at the root of your WordPress installation and add this constant:
define ('WP_RWL', true);
Once it's done, go to WP Rocket settings. You will see a new "White Label" tab. Inside this tab you will be able to change the plugin name, the url, the description, the author, and the author url.
Once you have updated the fields, simply remove the constant from the wp-config.php.