I dont know if there was an accident in applying the thing or not.
In any case you should be able to edit the options from grub. Or drop to TTY or boot into runlevel 3 and edit from there.
From grub, highlighting your selection, hit e and you can remove the lines.
(F10 or Ctrl+x to exit and continue booting)
Do note that this method is temporary - once in make permanent changes.