If Amazon is notified of a counterfeit Product, the correct action is NOT to remove the Product. There's no reason to think that there's anything wrong with that SKU (it's got the right description, part#, media assets, reviews, and everything).
The problem is the SellerItem - they ought to do something about the naughty seller who's trying to pass off the counterfeit item as if it's the actual Product.
Thus, even if Amazon nukes the offending Seller, the Product will still appear on the site. But one would hope that the offending seller is not listed as one of the choices for fulfilling the order.
Now, Amazon's apparent willingness to treat on-hand inventory from all Sellers as fungible is another problem...