Deletes a template assignment from an account-meter relationship, automatically adjusting adjacent template date ranges

Use this endpoint to remove a single template assignment from the account-meter’s template history. Cannot delete the last remaining template — at least one template must always exist. Adjacent templates are automatically adjusted: if deleting a middle template, the next template’s begin date is moved back; if deleting the last (most recent), the previous template’s end date extends to the account-meter’s end date; if deleting the first, the second template’s begin date is pulled to the account-meter’s begin date.