Attention
If an Event is deleted, your leads will not be able to book new meetings anymore.
Even though deleting Events will not effect already scheduled calls, we highly recommend disabling them, and hiding them from Events page (here's HOW).
Navigate to 
AI Scheduler → Events page
Locate Events you would like to delete
Click on the "Circle" button to select them
Once all selected, navigate to "Delete" button next to Create New Event
Warning message will appear
Cancel or
Confirm
In case you would like to delete a single Event, follow these steps:
Locate Event you would like to delete
Click on the three dots inside the Event card
Select Delete
Warning message will appear
Cancel or
Confirm