bigquery.bqml.ncaa_tutorial_test: test_ncaa_tutorial failed

[flaky-bot]

Note: #2800 was also for this test, but it was closed more than 10 days ago. So, I didn't mark it flaky.

---

commit: 02abb31
buildURL: Build Status, Sponge
status: failed

Test output

Traceback (most recent call last):
  File "/workspace/bigquery/bqml/ncaa_tutorial_test.py", line 38, in delete_dataset
    client.delete_dataset(full_dataset_id, delete_contents=True)
  File "/workspace/bigquery/bqml/.nox/py-3-8/lib/python3.8/site-packages/google/cloud/bigquery/client.py", line 1400, in delete_dataset
    self._call_api(
  File "/workspace/bigquery/bqml/.nox/py-3-8/lib/python3.8/site-packages/google/cloud/bigquery/client.py", line 636, in _call_api
    return call()
  File "/workspace/bigquery/bqml/.nox/py-3-8/lib/python3.8/site-packages/google/api_core/retry.py", line 281, in retry_wrapped_func
    return retry_target(
  File "/workspace/bigquery/bqml/.nox/py-3-8/lib/python3.8/site-packages/google/api_core/retry.py", line 184, in retry_target
    return target()
  File "/workspace/bigquery/bqml/.nox/py-3-8/lib/python3.8/site-packages/google/cloud/_http.py", line 438, in api_request
    raise exceptions.from_http_response(response)
google.api_core.exceptions.NotFound: 404 DELETE https://bigquery.googleapis.com/bigquery/v2/projects/python-docs-samples-tests/datasets/bqml_tutorial_6cd5a53377154b11991c37c3ddc1d3ef?deleteContents=true&prettyPrint=false: Not found: Dataset python-docs-samples-tests:bqml_tutorial_6cd5a53377154b11991c37c3ddc1d3ef