If you don't plan on getting a product back in, you may want to delete it from your products page.
If the products are already finished, skip steps 3 and 4.
Can't Click Red X (Grayed Out) -
To keep you safe, it won't allow you to delete a product if it has active packages in it. First you need to adjust them down to zero and then Finish off the package, Steps 3 and 4. If it's still not allowing you to, please try refreshing the page and trying again.