message: Don't delete log files
  Remove old remnant code that deleted files because they were too large.
  The large file problem is resolved by tarball-ing the outputs so we
  don't run out of disk space.
diff: @@ -539,11 +539,6 @@ def _run_roundtrip(
  roundtrip_log_strm.flush()
  - # Go ahead and delete the file if it's too large. CI build tends to run out of disk space.
  - if os.path.isfile(roundtrip_log_filepath) and \
  - os.path.getsize(roundtrip_log_filepath) > (128 * 1024 * 1024):
  - os.remove(roundtrip_log_filepath)
  -
  end_dt = datetime.now()
  delta = end_dt - start_dt
  print(f'end-time: {str(end_dt)} {str(delta)}')
  