function plt_hide_fast_secure_recaptcha_menus() {
//Hide the "Settings → Fast Secure reCAPTCHA" menu.
remove_submenu_page('options-general.php', 'fast-secure-recaptcha/fast-secure-recaptcha.php');
}
add_action('admin_menu', 'plt_hide_fast_secure_recaptcha_menus', 11);