While I'm not a lawyer, the MIT license is very short. It very clearly states that the MIT license shall be included in any projects that include copies or substantial portions of the MIT-licensed source code. As a result, any projects that are modifications/forks of an MIT-licensed project are, inherently, forced to have the MIT license included with them.
Or in short: You can't take an MIT licensed project, modify it, and remove the MIT license because of your modifications.
As such, 2xx04 is technically in violation of the MIT license. The main thing I don't know is whether that gives you the right to treat 2xx04's repository as though it is MIT license. However, you forked the original project, which means 2xx04 is directly referenced by your repository. To be honest, unless I intended to make money off such a project ... I wouldn't sweat it too hard.