remove shipping method from the magento checkout one page

Removed shipping method from onepage checkout in magento
This December, I have been working on magento onepage checkout customization for a client. They want to remove from shipping address step and shipping method as per their strategy.
Magento onepage checkout consist of six  steps-Checkout method, Billing Infomation,Shipping Information ,Shipping Method, Payment method and Order Review
When magento always used  billing address as shipping address .then there are not need to shipping address  tab   in magento  checkout  onepage. Some ecommerce site give shipping charge zero, so they want to skip this step, go to next step and remove shipping method from checkout process.
Thus make magento onepage checkout to faster and easy for customer.
For this work , first we change in some  mage core file.magento checkout  initialing from
app\code\core\Mage\Checkout\Block \Onepage.php
edit  in  public function getSteps() function

public function getSteps()
{
$steps = array();
if (!$this->isCustomerLoggedIn()) {
$steps['login'] = $this->getCheckout()->getStepData('login');
}
//$stepCodes = array('billing', 'shipping', 'shipping_method', 'payment', 'review');
//Comment By Abhay Khatariya and add by  Abhay Khatariya
$stepCodes = array('billing', 'payment', 'review');
//end of  Abhay Khatariya
foreach ($stepCodes as $step) {
$steps[$step] = $this->getCheckout()->getStepData($step);
}
return $steps;
}

Then edit  onepage controllers file that available in  app\code\core\Mage\Checkout\controllers\ OnepageController.php
Comment there

protected $_sectionUpdateFunctions = array(
'payment-method'  => '_getPaymentMethodsHtml',
// 'shipping-method' => '_getShippingMethodsHtml',
//Comment by  Abhay Khatariya
'review' => '_getReviewHtml',
);

Also edit  in saveBillingAction() function-
Code---

public function saveBillingAction()
{
if ($this->_expireAjax()) {
return;
}
if ($this->getRequest()->isPost()) {
//$postData = $this->getRequest()->getPost('billing', array());
//$data = $this->_filterPostData($postData);
$data = $this->getRequest()->getPost('billing', array());
$customerAddressId = $this->getRequest()->getPost('billing_address_id', false);
if (isset($data['email'])) {
$data['email'] = trim($data['email']);
}
$result = $this->getOnepage()->saveBilling($data, $customerAddressId);
if (!isset($result['error'])) {
/* check quote for virtual */
if ($this->getOnepage()->getQuote()->isVirtual()) {
$result['goto_section'] = 'payment';
$result['update_section'] = array(
'name' => 'payment-method',
'html' => $this->_getPaymentMethodsHtml()
);
}
//Comment by Abhay Khatariya
/*elseif (isset($data['use_for_shipping']) && $data['use_for_shipping'] == 1) {
$result['goto_section'] = 'shipping_method';
$result['update_section'] = array(
'name' => 'shipping-method',
'html' => $this->_getShippingMethodsHtml()
);
$result['allow_sections'] = array('shipping');
$result['duplicateBillingInfo'] = 'true';
}*/
//End of Comment by  Abhay Khatariya
else {
//Comment by Abhay Khatariya
//$result['goto_section'] = 'shipping';
$result['goto_section'] = 'payment';
}
}
$this->getResponse()->setBody(Mage::helper('core')->jsonEncode($result));
}
}

For this work edit in sales quote file in
\app\code\core\Mage\Sales\Model\Service\ Quote.php

protected function _validate()
{
$helper = Mage::helper('sales');
if (!$this->getQuote()->isVirtual()) {
$address = $this->getQuote()->getShippingAddress();
$addressValidation = $address->validate();
// Comment By  Abhay Khatariya
// if ($addressValidation !== true) {
// Mage::throwException(
//$helper->__('Please check shipping address information. %s', implode(' ', $addressValidation))
//);
//}
// $method= $address->getShippingMethod();
//$rate  = $address->getShippingRateByCode($method);
//if (!$this->getQuote()->isVirtual() && (!$method || !$rate)) {
//Mage::throwException($helper->__('Please specify a shipping method.'));
//}
// end of Comment By Abhay Khatariya
}

And your checkout onepage have  four  steps-Checkout method, Billing Information,Payment method and Order Review.
In billing information tab  you see radio buttom for  shipping address as billing address ,just hidden it or remove it .the file located at - app\design\frontend\default\your template\yourtemplate\persistent\checkout\onepage\billing,phtml
Or
app\design\frontend\default\your template\template \checkout\onepage\billing,phtml
Now checkout successfully.
When you get order success email you shipping address is missing in email so edit /remove some
In  app\locale\en_US\template\email\sales\ order_new.html
From
{{var order.getShippingAddress().format('html')}}
To
{{var order.getBillingAddress().format('html')}}
And
{{var order.getShippingDescription()}}
Remove it.
Now redefine the checkout onepage  process . It will lot of help to you.