cleaning project of unused files

I tested "archyve" and "extract" version- all unused files are still here.

Unused files are leftovers of various wizard generated megafunctions. Or something I wrote by hand and included in project. Then, after some time, these functions are removed from main project and they don't do anything. I can remove them from "project navigator", but they are still in project folder.

It is simple "trash". I can delete these file manualy, but sometimes it is hard to remember if it is usable in project.

So, maybe there is safe and automagic way to cleanup and purge project from this leftovers.