code: func (s *RegistrarService) ChangeDomainDelegationFromVanity(accountID string, domainName string) (*vanityDelegationResponse, error) {
  	path := versioned(fmt.Sprintf("/%v/registrar/domains/%v/delegation/vanity", accountID, domainName))
  	delegationResponse := &vanityDelegationResponse{}
  
  	resp, err := s.client.delete(path, nil, nil)
  	if err != nil {
  		return nil, err
  	}
  
  	delegationResponse.HttpResponse = resp
  	return delegationResponse, nil
  }
docs: // ChangeDomainDelegationFromVanity disables vanity name servers for the given domain.
  //
  // See https://developer.dnsimple.com/v2/registrar/delegation/#dedelegateFromVanity