You can delete a template by navigating to the Scheduler, clicking the Templates tab, and then clicking the Template you would like to delete from the list of templates on the left side of the screen. When in the template, select the "Edit This Template" button.
On the next screen, click the "Delete This Template" button.
Note: Deleting a template does not affect any events that have already been approved from that template. Only the unapproved, pending events are deleted.