Removing sorting parameters from URL product page

Hello!

I'm new here, but beginning with OpenCart.
I have queries vis-a-vis how can I do to not appear in the URL of a product page to a sorting parameters.
More specifically, if sorting is done on a product page and then choose a product in the product page URL parameters that appear sort - basically, these parameters are automatically added to the queue URL.

Instead of being clean URL, that consists of category/product-name virtually URL is something like category/product-name?sort=p.price&order=ASC

How can I remove those parameters? ... There is a module that does that or has changed something in the code?
Waiting for your answers and suggestions.
Thanks in advance.