Magento: Product Bulk Images Deletion

<?php
require_once('../app/Mage.php');
umask(0);
Mage::app('admin');
ini_set('display_errors', 1);
echo 'Delete Imgaes script runing at '.date("Y-m-d h:i:sa").' <br/>';
try{
    $csv = new Varien_File_Csv();
    $csvfilepath = '../../../../tmp/deleteimages.csv';
   
    $cssfile = fopen($csvfilepath,"r");  
    $data = $csv->getData($csvfilepath);
    //Mage::log('CSV file exsist', null, 'bulkimagesimport.log');
    echo 'CSV file exsist <br/>';
    $rows = count($data);
    for ($j = 1; $j<= $rows; $j++) {
        $productSKU = $data[$j][0];
        if(!empty($productSKU)){
            $product = Mage::getModel('catalog/product')->loadByAttribute('sku',$productSKU);
            if (!$product){
                //Mage::log($productSKU.' SKU doesn`t exsist', null, 'bulkimagesimport.log');
                echo $productSKU.' SKU doesn`t exsist <br/>';
            }else{
                //deleting
                Mage::app()->getStore()->setId(Mage_Core_Model_App::ADMIN_STORE_ID);              
                $mediaApi = Mage::getModel("catalog/product_attribute_media_api");
                $product = Mage::getModel('catalog/product')->load($product->getId());
                $items = $mediaApi->items($product->getId());
                $attributes = $product->getTypeInstance()->getSetAttributes();
                $gallery = $attributes['media_gallery'];
                foreach($items as $item){
                    if ($gallery->getBackend()->getImage($product, $item['file'])) {
                        $gallery->getBackend()->removeImage($product, $item['file']);
                    }
                }
                $product->save();
                echo 'Images deleted for sku '.$productSKU.'<br/>';
            }
        }
    }
    fclose($cssfile);
    echo 'Deletion Successfully at '.date("Y-m-d h:i:sa").' <br/>';
}  catch (Exception $e){
    //Mage::log($e->getMessage(), null, 'bulkimagesimport.log');
    echo $e->getMessage();
}