If you've got rootsh installed then removing it's just a matter of doing:
Unless you know exactly what you're doing, I wouldn't recommend trying to edit the file. You'll probably find that removing it will result in whatever customised packages you've got installed (alternate hildon-desktop for example) being removed. In this case, you'd be best just filing a bug against either the package itself (if you installed it directly) or against whatever tool you used to install it. Hopefully then the author will actually fix the issue and it'll stop cropping up every week.

Oh, and if you don't have rootsh installed then you'll probably need to reflash.