Or GW could just be fighting for their copyrights. To force someone to stop distributing something that cannot be distributed is a jerky thing to do, but they have every right to do, even if they don't plan to re-release.
Technically speaking, if you DON'T enforce a copyright, you might LOSE it. So, they might have to pull their weight gently (please remove this), when their only other options are losing the game forever or being forced to sue.