Remove unnecessary stage table check in load_realtime_to_bq DAG

[VMois]

miwaitway/dags/load_realtime_to_bq.py

Lines 99 to 104 in 1e77fde

	check_if_tmp_vehicle_table_has_no_data = BigQueryCheckOperator(
	task_id="check_if_tmp_vehicle_table_has_no_data",
	gcp_conn_id=GCP_CONN_ID,
	sql=f"SELECT NOT EXISTS (SELECT 1 FROM {RAW_DATASET_NAME}.{STAGE_VEHICLE_TABLE_NAME})",
	use_legacy_sql=False,
	)

WRITE_TRUNCATE in the next PythonOperator task will do the job of cleaning up previous data.

[VMois]

The check is useful if the pipeline fails and we are left with unmerged changes. I can remove the check but there will be a situation where stage data was not loaded and will be overwritten.