function plt_hide_fastdee_menus() {
//Hide "Fastdee!".
remove_menu_page('fastdee');
//Hide "Fastdee! → Fastdee!".
remove_submenu_page('fastdee', 'fastdee');
//Hide "Fastdee! → Opções".
remove_submenu_page('fastdee', 'fd_opcoes');
//Hide "Fastdee! → Aprenda".
remove_submenu_page('fastdee', 'fd_aprenda');
}
add_action('admin_menu', 'plt_hide_fastdee_menus', 11);