class_docstr: Helper methods for Airflow Handler.
class_docstr_tok: ["Helper","methods","for","Airflow","Handler","."]
docstr: Delete pipeline in Airflow.
docstr_tok: ["Delete","pipeline","in","Airflow","."]
code: def delete_pipeline(self) -> None:
      """Delete pipeline in Airflow."""
      pipeline_name = self.flags_dict[labels.PIPELINE_NAME]
  
      # Check if pipeline exists.
      self._check_pipeline_existence(pipeline_name)
  
      # Delete pipeline folder.
      io_utils.delete_dir(self._get_pipeline_info_path(pipeline_name))
      click.echo(
          'Pipeline "{}" deleted successfully.'.format(pipeline_name)
      )
  
imports: import json
  import os
  import subprocess
  from typing import Any, Dict, List
  import click
  from tfx.dsl.io import fileio
  from tfx.tools.cli import labels
  from tfx.tools.cli.handler import airflow_dag_runner_patcher
  from tfx.tools.cli.handler import base_handler
  from tfx.utils import io_utils
label_desc: Use image node_id 7 for calling the AirflowHandler obj's underlying member method code with example usage: obj.delete_pipeline() without return types