Removing Duplicate Calendars - Finding Where They are Assigned

We have an instance where multiple versions of the same calendar exist within the same workspace (human error on copying projects). In order to remove the duplicates, we first need to unassign them from the activities contained within both the project and critically, the baselines. Unfortunately, this is an issue across circa 20 projects, each with around 10 baselines so it is not as straightforward as opening the baselines and checking due to the scale we are looking at.

Is there a way to see exactly where calendars are assigned as the 'Used By' function only shows you which workspace is using the calendar and not the actual project/baseline.