code: func (api *API) DeleteZone(zoneID string) (ZoneID, error) {
  	res, err := api.makeRequest("DELETE", "/zones/"+zoneID, nil)
  	if err != nil {
  		return ZoneID{}, errors.Wrap(err, errMakeRequestError)
  	}
  	var r ZoneIDResponse
  	err = json.Unmarshal(res, &r)
  	if err != nil {
  		return ZoneID{}, errors.Wrap(err, errUnmarshalError)
  	}
  	return r.Result, nil
  }
docs: // DeleteZone deletes the given zone.
  //
  // API reference: https://api.cloudflare.com/#zone-delete-a-zone