Well at the top it says that the commit is not part of any branch. So presumably this commit was removed from master and its history rewritten to exclude it from the commit tree.

Edit: see reply from verdverm

It says that about every file in the repo

It seems more like source available than Twitter developing as open source

Looking at that I am still wondering how it got there. That isn't something that just happens, someone wrote that code and that means someone put some thought into it. I am not saying it can't possibly be irrelevant but it isn't nothing either.

Force push : not just for Jedi.

That comment seems to be authored by a PR firm and approved by legal.