Hide options with price 0 from cart, checkout, etc

Hi,

If an option product doesn't have any characteristic, if you select no, the option won't appear in the checkout/cart.
So I suppose that your optionproduct has a characteristic with several values. And in that case, the system doesn't add a "no" choice and only display the choices based on the variants of the product, and it doesn't which one is the one you don't want to display, if there is one.
So the solution instead, is to remove that choice (by removing the variant from the option product), and add the code:

$this->values[] = JHTML::_('select.option', 0,JText::_('HIKASHOP_NO'));

$defaultValue=array();

Sure. Change the code:
(int)$value
to:
''
in that same view file and that should do it.