Remove "related_product" from URL

Hi,

You need to change the line:
$category_pathway = '&category_pathway='.JRequest::getInt('category_pathway',0).'&related_product='.$product_id;

to:
$category_pathway = '&category_pathway='.JRequest::getInt('category_pathway',0);

in the file components/com_hikashop/views/product/view.html.php

in that same file you should add the code:
$category_pathway = '';
before the code:
$this->assignRef('category_pathway',$category_pathway);