Admin problem: User created shared Bookings calendar

I was helping a user t-shoot an issue with a shared Bookings calendar and noticed he had created a shared Bookings calendar for him and another user. This was redundant and he had no means of deleting this calendar. The shared Bookings calendar did not show up in my view of shared Bookings calendars but I could find the calendar listed in users in the Admin center.

This is a problem. The admin center doesn't identify these "users" as booking calendars and the Bookings interface doesn't have a real admin capability.

Am I overlooking where I should be able to see these user created calendars?