Hi,
There is no option for that, so what you want to do is to edit your product page layout ( show_default normally, but in your case it's show_tabular) via the menu Display>Views and remove the lines:
$this->setLayout('quantity');
echo $this->loadTemplate();
That will remove the add to cart and "no stock" message for the default variant of the products.
Note that this supposes that all the products are like that. If you have other products without variants, or without a default variant that you don't want to be purchasable, you want to add a condition on that piece of code instead of removing the code, so that you remove the display of that area only when necessary.