Well first of all these games were never listed on GoG.
Secondly, they can’t (legally) do anything about a publisher refusing to sell games anymore. That’s their IP and they have the legal right to make that decision.
What they can do is ensure games that you’ve already purchased continue to work in the future.
Warner Bros. is delisting games again: a half-dozen Cartoon Network releases have been removed from sale on digital storefronts (www.pcgamer.com) angielski
Fuckin Warner Bros!