class_docstr: Helper methods for Vertex Handler.
class_docstr_tok: ["Helper","methods","for","Vertex","Handler","."]
docstr: Delete pipeline in the environment.
docstr_tok: ["Delete","pipeline","in","the","environment","."]
code: def delete_pipeline(self) -> None:
      """Delete pipeline in the environment."""
      pipeline_name = self.flags_dict[labels.PIPELINE_NAME]
      self._check_pipeline_existence(pipeline_name)
  
      io_utils.delete_dir(
          os.path.join(self._handler_home_dir, pipeline_name)
      )
  
      click.echo("Pipeline " + pipeline_name + " deleted successfully.")
  
imports: import functools
  import os
  import sys
  import click
  from google.cloud import aiplatform
  from google.cloud.aiplatform import pipeline_jobs
  from tfx.dsl.io import fileio
  from tfx.tools.cli import labels
  from tfx.tools.cli.handler import base_handler
  from tfx.tools.cli.handler import kubeflow_handler
  from tfx.tools.cli.handler import kubeflow_v2_dag_runner_patcher
  from tfx.utils import io_utils
label_desc: Use image node_id 4 for calling the VertexHandler obj's underlying member method code with example usage: obj.delete_pipeline() without return types