code: def downgrade():
      """Unapply Add index to task_instance table"""
      # At 2.8.1 we removed this index as it is not used, and changed this migration not to add it
      # So we use drop if exists (cus it might not be there)
      import sqlalchemy
      from contextlib import suppress
  
      with suppress(
          sqlalchemy.exc.DatabaseError
      ):  # mysql does not support drop if exists index
          op.drop_index(
              "ti_state_incl_start_date",
              table_name="task_instance",
              if_exists=True,
          )
  
imports: from __future__ import annotations
  from alembic import op
label_desc: Use image node_id 2 for calling a global function with example usage: downgrade() without return types