Hello, Aristophanes.
This package was removed, since it contains a list of distros that don't
respect users' freedom (software that does not respect Free System
Distribution Guidelines).
As you can see here, it was fixed, and the fix is FUSBi program which does
what is recommended (changes or removes the list of distors available -- I've
never used that program). But I discovered that it is unmaintained. In fact,
I can't even download it from the project's website, and it's not in Trisquel
repos either.
While browsing threads, I found this, hope it will help you :)
here is that discussion.
It seems that there are no binaries around, so you will need to build
freenetbootin, as written in README. But don't you want to use dd? Fedora in
its ~clear~ form contains proprietary software, to be noted.
Have a good time!