Deletes a calendar.
DELETE _ml/calendars/<calendar_id>
This API removes all scheduled events from the calendar then deletes the
calendar.
- 
calendar_id(required)
- 
  (string) Identifier for the calendar.
You must have manage_ml, or manage cluster privileges to use this API.
For more information, see Security Privileges.
The following example deletes the planned-outages calendar:
DELETE _ml/calendars/planned-outages
When the calendar is deleted, you receive the following results: