I was having a problem with a re-install on a new (old) laptop, got my cm15a working, could not get my va11a working, so wanted a TOTAL uninstall and reinstall. I could NOT get the x10nets components to delete even. I finally just renamed the extension (pick anything random, mine were expletives because I had waisted much time) and then reboot, and you can delete them. Then continue on with your life.
This same trick should work if you just want to disable them... rename, reboot, poof, done.