def METHOD_NAME():
    # ### commands auto generated by Alembic - please adjust! ###
    with op.batch_alter_table('pipelines', schema=None) as batch_op:
        batch_op.drop_constraint(None, type_='foreignkey')
        batch_op.drop_column('ml_model_id')
    with op.batch_alter_table('enqueued_tasks', schema=None) as batch_op:
        batch_op.alter_column('task_name',
               existing_type=sa.String(length=100),
               type_=mysql.VARCHAR(length=255),
               existing_nullable=True)
        batch_op.alter_column('task_namespace',
               existing_type=sa.String(length=60),
               type_=mysql.VARCHAR(length=100),
               existing_nullable=True)
    op.drop_table('ml_model_timespans')
    op.drop_table('ml_model_label')
    op.drop_table('ml_model_hyper_parameters')
    op.drop_table('ml_model_features')
    op.drop_table('ml_model_bigquery_dataset')
    op.drop_table('ml_models')
    # ### end Alembic commands ###