Removing item from cart using Ajax

<?php>
echo $item->lengthm . ' kg'; // lengthm is a custom item field - naming convention??...
$url = hikashop_contentLink('product&task=show&cid=' . $product->product_id . '&name=' . $product->alias . $url_itemid, $product);
$delete_url = hikashop_completeLink('/product&task=updatecart&product_id='.$product->product_id.'&quantity=0');
?>
<input id="hikashop_checkout_quantity_<?php echo $product->cart_product_id;?>"
            type="hidden" name="checkout[cart][item][<?php echo $product->cart_product_id;?>]"
           data-hk-qty-old="<?php echo $product->cart_product_quantity; ?>"
            value="<?php echo $product->cart_product_quantity; ?>"/>
<div class="hikashop_cart_product_quantity_refresh">
    <a class="hikashop_no_print"
          data-cart-type="<?php echo $this->escape($cart->cart_type); ?>"
          data-cart-id="<?php echo (int)$cart->cart_id; ?>"
          data-cart-product-id="<?php echo (int)$product->cart_product_id; ?>"
           href="<?php echo $delete_url; ?>"
           onclick="window.hikashop.deleteFromCart(this, null, false); alert('Go to product URL'); return false;">
           <i class="fa fa-sync"></i>
    </a>
</div>