Well, the stuff that I'm aware of:
Should be a single file that you created, probably ftdi.rules or something?
2) Purge brltty and libbrlapi [although they may be a little less intrusive regarding libftdi now]
3) There's maybe some gpsd config stuff, but really it's not hard to re-do that one
4) If you've used it, ~/.obdgpslogger
- And if you haven't used it and weren't aware of it, check the manpage for "dot-obdgpslogger" (5) :-D
Assuming you're using ubuntu, packages to reinstall starting from scratch off the top of my head [to enable all features]:
sudo apt-get install cmake build-essential libgps17 libgps-dev gpsd libdbus-1-dev zlib1g-dev subversion libfltk1.1-dev fluid make g++ gcc