How do I remove the 802.1X settings in Mountain Lion
Try System Preferences &gt; 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)