I'm too jaded to pointlessly debate all the misunderstandings about copyright and licenses. Bottom line is, this case is clearly not going to court, so there's no entity allowing or not allowing them to do anything, the only thing that matters is does this act of hiding enrages the original author even more? My answer to that is yes. Plus that old commit is still there, accessible after a couple of rather obscure clicks, so it's not even taken down if you want to debate technicalities.