def METHOD_NAME():
    # WARM_UPGRADE_STARTED_FLAG is used as warm_upgrade.py process start flag
    if os.path.exists(WARM_UPGRADE_STARTED_FLAG):
        os.remove(WARM_UPGRADE_STARTED_FLAG)
    # WARM_UPG_FLAG is used as port related service judgment flag
    if os.path.exists(WARM_UPG_FLAG):
        os.remove(WARM_UPG_FLAG)