function plt_hide_captcha_eu_menus() {
//Hide the "Captcha" menu.
remove_menu_page('captcha-eu');
//Hide the "Captcha → Overview" menu.
remove_submenu_page('captcha-eu', 'captcha-eu');
//Hide the "Captcha → Settings" menu.
remove_submenu_page('captcha-eu', 'captcha-eu-settings');
}
add_action('admin_menu', 'plt_hide_captcha_eu_menus', 21);