Remove wishlist items when added to cart

I want to remove the wishlist products that are added to the cart. I’ve followed this link: Keeping wishlist items for keeping the wish list items after being added to the cart.i have set my $delete to true as shown in the code below but the product isn’t removed from the wishlist.

Here is my indexcontroller.php path and code

app/code/core/Mage/Wishlist/controllers/IndexController.php

/**
 * Add wishlist item to shopping cart and remove from wishlist
 *
 * If Product has required options - item removed from wishlist and redirect
 * to product view page with message about needed defined required options
 */

public function cartAction()
{
    if (!$this->_validateFormKey()) {
        return $this->_redirect('*/*');
    }
    $itemId = (int) $this->getRequest()->getParam('item');

    /* @var $item Mage_Wishlist_Model_Item */
    $item = Mage::getModel('wishlist/item')->load($itemId);
    if (!$item->getId()) {
        return $this->_redirect('*/*');
    }
    $wishlist = $this->_getWishlist($item->getWishlistId());
    if (!$wishlist) {
        return $this->_redirect('*/*');
    }

    // Set qty
    $qty = $this->getRequest()->getParam('qty');
    if (is_array($qty)) {
        if (isset($qty[$itemId])) {
            $qty = $qty[$itemId];
        } else {
            $qty = 1;
        }
    }
    $qty = $this->_processLocalizedQty($qty);
    if ($qty) {
        $item->setQty($qty);
    }

    /* @var $session Mage_Wishlist_Model_Session */
    $session    = Mage::getSingleton('wishlist/session');
    $cart       = Mage::getSingleton('checkout/cart');

    $redirectUrl = Mage::getUrl('*/*');

    try {
        $options = Mage::getModel('wishlist/item_option')->getCollection()
                ->addItemFilter(array($itemId));
        $item->setOptions($options->getOptionsByItem($itemId));

        $buyRequest = Mage::helper('catalog/product')->addParamsToBuyRequest(
            $this->getRequest()->getParams(),
            array('current_config' => $item->getBuyRequest())
        );

        $item->mergeBuyRequest($buyRequest);

        if ($item->addToCart($cart, true)) {
            $cart->save()->getQuote()->collectTotals();
        }


        $wishlist->save();
        Mage::helper('wishlist')->calculate();

        if (Mage::helper('checkout/cart')->getShouldRedirectToCart()) {
            $redirectUrl = Mage::helper('checkout/cart')->getCartUrl();
        }
        Mage::helper('wishlist')->calculate();

        $product = Mage::getModel('catalog/product')
            ->setStoreId(Mage::app()->getStore()->getId())
            ->load($item->getProductId());
        $productName = Mage::helper('core')->escapeHtml($product->getName());
        $message = $this->__('%s was added to your shopping cart.', $productName);
        Mage::getSingleton('catalog/session')->addSuccess($message);
    } catch (Mage_Core_Exception $e) {
        if ($e->getCode() == Mage_Wishlist_Model_Item::EXCEPTION_CODE_NOT_SALABLE) {
            $session->addError($this->__('This product(s) is currently out of stock'));
        } else if ($e->getCode() == Mage_Wishlist_Model_Item::EXCEPTION_CODE_HAS_REQUIRED_OPTIONS) {
            Mage::getSingleton('catalog/session')->addNotice($e->getMessage());
            $redirectUrl = Mage::getUrl('*/*/configure/', array('id' => $item->getId()));
        } else {
            Mage::getSingleton('catalog/session')->addNotice($e->getMessage());
            $redirectUrl = Mage::getUrl('*/*/configure/', array('id' => $item->getId()));
        }
    } catch (Exception $e) {
        Mage::logException($e);
        $session->addException($e, $this->__('Cannot add item to shopping cart'));
    }

    Mage::helper('wishlist')->calculate();

    return $this->_redirectUrl($redirectUrl);
}

Here is my Item.php path and code

app/code/core/Mage/Wishlist/Model/Item.php

 /**
 * Add or Move item product to shopping cart
 *
 * Return true if product was successful added or exception with code
 * Return false for disabled or unvisible products
 *
 * @throws Mage_Core_Exception
 * @param Mage_Checkout_Model_Cart $cart
 * @param bool $delete  delete the item after successful add to cart
 * @return bool
 */
public function addToCart(Mage_Checkout_Model_Cart $cart, $delete=true)
{
    $product = $this->getProduct();
    $storeId = $this->getStoreId();

    if ($product->getStatus() != Mage_Catalog_Model_Product_Status::STATUS_ENABLED) {
        return false;
    }

    if (!$product->isVisibleInSiteVisibility()) {
        if ($product->getStoreId() == $storeId) {
            return false;
        }
    }

    if (!$product->isSalable()) {
        throw new Mage_Core_Exception(null, self::EXCEPTION_CODE_NOT_SALABLE);
    }

    $buyRequest = $this->getBuyRequest();

    $cart->addProduct($product, $buyRequest);
    if (!$product->isVisibleInSiteVisibility()) {
        $cart->getQuote()->getItemByProduct($product)->setStoreId($storeId);
    }

    if ($delete) {
        $this->delete();
    }

    return true;
}