code: public void project_serviceName_instance_instanceId_interface_interfaceId_DELETE(String serviceName, String instanceId, String interfaceId) throws IOException {
  		String qPath = "/cloud/project/{serviceName}/instance/{instanceId}/interface/{interfaceId}";
  		StringBuilder sb = path(qPath, serviceName, instanceId, interfaceId);
  		exec(qPath, "DELETE", sb.toString(), null);
  	}
docs: Delete an interface
  
  REST: DELETE /cloud/project/{serviceName}/instance/{instanceId}/interface/{interfaceId}
  @param instanceId [required] Instance id
  @param interfaceId [required] Interface id
  @param serviceName [required] Service name