code: def downgrade():
      """Unapply Add DagRunNote and TaskInstanceNote"""
      op.drop_table("task_instance_note")
      op.drop_table("dag_run_note")
  
imports: from __future__ import annotations
  import sqlalchemy
  from alembic import op
  from airflow.migrations.db_types import StringID
  from airflow.utils.sqlalchemy import UtcDateTime
label_desc: Use image node_id 2 for calling a global function with example usage: downgrade() without return types