Delete Product Custom options

sandbox.php

<?php
/**
 * Created by JetBrains PhpStorm.
 * User: amacgregor
 * Date: 10/21/11
 * Time: 12:38 PM
 * To change this template use File | Settings | File Templates.
 */
 
    require_once 'app/Mage.php';
    umask(0);
    Mage::app();
    $id = 39;

    $product = Mage::getModel('catalog/product')->load($id);

$options =$product->getOptions();
    foreach ($options as $option)
        {
            if ($option->getTitle() == $optionTitle) :
                unset($this->_options[$option->getId()]);
                break ;
            endif;
        }
    //$product->save();