Hide CWA menu

Sorry for the late response,

Sadly this can’t be done via css so to do it comment line 57 of customize-wp-admin.php

from
add_menu_page('Customize WP-Admin', __('CWA Settings','customize-wp-admin'), 'administrator', __FILE__, 'cwa_settings_page',plugins_url('/images/icon.png', __FILE__));

to
//add_menu_page('Customize WP-Admin', __('CWA Settings','customize-wp-admin'), 'administrator', __FILE__, 'cwa_settings_page',plugins_url('/images/icon.png', __FILE__));