Do not expose products with stock 0 in variants

[loky62]

Hi,
I have a problem in the parent / child products.

In Configuration / Exhibition I can set two flags.
- The first to hide the product if the father has stock 0
- The second to hide the product if all children have stock 0

But I have a product with only a few variants stock at 0, how do I delete only those by showing only those salable?

Joomla 3.5.1 - 3.0.16 Virtuemart.