Zimbra Server: Version 4.5.5_GA_838.RHEL4_64 May 11, 2007

I feel like I must be missing something easy, however I searched around the net looking to figure out how to delete a shared calendar from the Web Interface. We have some people who chose the wrong settings when adding a shared calendar on the network, now they are unable to edit those settings or remove the calendar in question. There is a check box to enable and disable the viewing of the calendar, but I want to completely remove it. I apologize if I missed something obvious, but how to I remove a shared calendar? Thanks.
Mike