Remove associated products in magento

In magento it is very difficult to remove numbers of simple products which are associated with one configurable manually. So here i show programmatically how to remove and save your valuable time. If you are familiar with magento programming then it good to go else don’t do it.

<?php
require_once 'app/Mage.php';
Mage::app();
Mage::setIsDeveloperMode(true);
umask(0);

$file_handle = fopen("associated-products.csv", "r");
while (!feof($file_handle) ) {
	$line_of_text = fgetcsv($file_handle, 1024);
	$simpleSku = $line_of_text[0];
	$configurableSku = $line_of_text[1];
	echo $simpleSku." = ".$configurableSku."<br/>";

        $simpleProduct = Mage::getModel('catalog/product')->loadByAttribute('sku',$simpleSku);
	$configurableProduct = Mage::getModel('catalog/product')->loadByAttribute('sku',$configurableSku);
	
	$simpleId = $simpleProduct->getId();
	$configurableProductId = $configurableProduct->getId();
	echo $simpleId." = ".$configurableProductId."<br/>";
	$ids = $configurableProduct->getTypeInstance()->getUsedProductIds();
	
	$resource = Mage::getSingleton('core/resource');
	$read = Mage::getSingleton('core/resource')->getConnection('core_read');
	$write = $resource->getConnection('core_write');

        $write->query("delete from catalog_product_super_link where parent_id=".$configurableProductId." AND product_id='".$simpleId."'"); 
}
fclose($file_handle);
?>

Steps:
1. Create an excel file and save as “associated-products.csv” or any you wish.
2. IMP: Not necessary to provide column name in sheet as shown, you can place direct skus & configurable sku. Pl note first column is simple skus & on second column it is configurable sku from which you want to remove.
3. Upload csv file to root path of magento on server.
4. Create a file “config-associated.php” and add code as shown above and upload to root of magento.
5. Run the url www.yourdomain.com/config-associated.php.

Make sure all the listed simple skus will be removed from the config product. here as e.g.: 1234 is config product and on first column all are simple products will be removed.