Apple - How do I remove the 802.1X settings in Mountain Lion

Try System Preferences > Profiles. It listed my 802.1X profiles and I was able to remove them from there.

Alternatively, you can manually edit configuration files in /Library/Preferences/SystemConfiguration (see this post) - grep the files located there for the name of your profile.

(Using OS X Mavericks)

(Profiles is located in the second row from the bottom)