I put my Bachelor thesis on GitHub (both the text and the code itself). Today, my mentor found it via Googling (?) and contacted me about it. He said that he is afraid that DABAR (the Croatian repository of Bachelor theses and Master theses) might make a lawsuit against us because of that. So, he thinks that it would be best to delete the text of my Bachelor thesis from GitHub.
Are my mentor's fears realistic? How likely am I to actually get into a legal trouble because of that? Is that actually illegal, considering that my repository is under the MIT licence? As far as I understand it, it might be illegal if I chose the GPL licence or no licence at all, but it's not illegal if it is under the MIT licence.
Update: At the insistence of my mentor, I did some history rewriting on GitHub and contacted the owner of the forked repo asking him to do the same thing.