>but not a DMCA problem.

They do claim this:

a large portion of the uploaded code is copyrighted by the University of Illinois. Therefore, the repositories identified below constitute a violation of U.S. Copyright laws, in particular section(s) 1201(a)(2) and/or 1201(b)(1) of Title 17 of the United States Code, commonly referred to as the Digital Millennium Copyright Act, or "DMCA".

What do you think about that?

If it's true, then this is proper use of the DMCA. The code itself is no longer visible so nobody here can say for sure.

here there is a repo, public accesible -- although I can't be sure they are related

https://github.com/BtXin/cs241_mps