function plt_hide_shift8_cdn_menus() {
//Hide the "Shift8" menu.
remove_menu_page('shift8-settings');
//Hide the "Shift8 → Shift8" menu.
remove_submenu_page('shift8-settings', 'shift8-settings');
//Hide the "Shift8 → CDN Settings" menu.
remove_submenu_page('shift8-settings', 'shift8-cdn/components/settings.php/custom');
}
add_action('admin_menu', 'plt_hide_shift8_cdn_menus', 11);