That particular change is made in a few framework files. If you just use a blank widget.txt file, it will not remove it entirely. To do so, you'd need to replace the modified framework files with those that do not include this mod. That being said, you have a ROM that includes it, and some ROM developers have flashable mods to remove it. It would help to know what exactly you're running. Go to menu->settings->about phone->software information, and let us know what you see there for all entries, if you can. If absolutely nothing else, you can make a backup with titanium backup, flash a close-to-stock ROM, and restore some stuff. You'll have to redo some things, but not everything.