Delete entity with the given entity type and entity value.

def delete_entity(project_id, entity_type_id, entity_value):
    """Delete entity with the given entity type and entity value."""
    import dialogflow_v2 as dialogflow
    entity_types_client = dialogflow.EntityTypesClient()

    entity_type_path = entity_types_client.entity_type_path(
        project_id, entity_type_id)

    entity_types_client.batch_delete_entities(
        entity_type_path, [entity_value])