In the case of MIT license you can change the license of future and past versions as long as you have no other copyright holders (i.e. contributors) but that wo

In the case of MIT license you can change the license of future and past versions as long as you have no other copyright holders (i.e. contributors) but that won't help you much unless nobody has actually made use of that license on previous versions. They retain that license and can still publish it under MIT even if you do not. I think revocation of the license is only possible when the terms were violated.