I think this article is rather misleading, or the headline is specifically. Before this article was written there was DMC 3 Special Edition, DMC4, DMC 4 Special Edition, and DMC HD Collection.
DMC 3 Special Edition and DMC 4 are the two being removed. DMC 3 SE was a terrible port that barely runs on just about any machine, and DMC 4 is just the inferior version of DMC 4 SE.
DMC 3 is still available in the DMC HD Colleciton, and is actually playable. So Both games are still available in their actually playable form.
It's even older than that, Sins originally came out in 2008.