Q: Delete Agenda Goals

In all my calendars that sync across icloud there appears over 100 items called Agenda Goals in the calendar sidebar. It's frustrating because my actual calendars I use are buried in the sidebar. I have tried deleting the agenda goals one by one, but they keep reappearing. It makes for a very cumbersome experience. Can anyone tell me how to get rid of these calendars for good? I did not set them up, they seemed to appear by default. Thanks in advance.