Un-LinkedIn

I haven't been using LinkedIn much but a recent job inquiry spam, received through their newly added job search service, made me visit out of curiosity (attraction to virtual dusty attics?). While I was there, I was reminded of the two link to strangers invitations from whom I foolishly accepted when I first started using LinkedIn.

The problem is that I found no links or buttons at LinkedIn that allowed me to disconnect a connection. Can someone point out where or how I can do this? Where is the scissor in social networking?