Awhile ago I subscribed to my workspace's Confluence calendar where everyone sets their PTO and OoO dates. I did so using these instructions, and it worked great because I can now see those events at the top of my Google Calendar; see screenshot.

Our company has since begun using a different method for tracking these events, so now I want to unsubscribe from the Confluence calendar so that none of those types of events appear at the top of my calendar.
I do not see any way to reverse the subscription. Any suggestions?
Thanks much,
Randy