That file was probably accidentally created when editing the file. This will move it into your home directory. You can delete it from there after you are sure it is not necessary.
sudo mv bumblebee-stable-precise.list.save.1 ~/
Next go ahead and remove those nvidia packages with:
your packages were a little different than the ones installed on my system so the command I gave you previously was incorrect.
sudo apt-get autoremove --purge nvidia-common nvidia-current-updates nvidia-settings-updates
Then do the ppa-purge as I described earlier for both ppa's.
Finally reboot. You should now be back to a working system without bumblebee.
If you chose to try bumblebee again just remember not to use the ppa:ubuntu-x-swat/x-updates repository.