Deleting 802.1X profile?

When I bought my iMac last year I restore my data from my MacBook Pro which has carried over a 802.1X profile that I used to use for when I was at university. I don't use it anymore.

I've noticed that it is interfering with Firefox wherever I try and use it, and keeps popping up asking for credentials. I can't figure out how to delete the 802.1X profile?

I've searched online and it appears it was relatively easier in the past with older version of OS X where it would have the minus button, that's not there anymore in Mavericks.

Any suggestions?

Thanks