Magento how to remove minimum quantity allowed for purchase validation error

Just comment the line below:

 /public_html/app/code/core/Mage/CatalogInventory/Model/Stock/Item.php

if ($this->getMinSaleQty() && $qty->getMinSaleQty())
{
    $result->setHasError(true)
           ->setMessage(Mage::helper('cataloginventory')
           ->__('The minimum quantity allowed for purchase is %s.', $this->getMinSaleQty() * 1))
           ->setQuoteMessage(Mage::helper('cataloginventory')
           ->__('Some of the products cannot be ordered in requested quantity.'))
           ->setQuoteMessageIndex('qty');
            return $result;
}