Deal with the bad check in test_load.py

[mariosasko]

This PR removes a check that's been added in #2684. My intention with this check was to capture an URL in the error message, but instead, it captures a substring of the previous regex match in the test function. Another option would be to replace this check with:

m_paths = re.findall(r"\S*_dummy/_dummy.py\b", str(exc_info.value))  # on Linux this will match an URL as well as a local_path due to different os.sep, so take the last element (an URL always comes last in the list)
assert len(m_paths) > 0 and is_remote_url(m_paths[-1])  # is_remote_url comes from datasets.utils.file_utils

@lhoestq Let me know which one of these two approaches (delete or replace) do you prefer?

[lhoestq]

Hi ! I did a change for this test already in #2662 :

datasets/tests/test_load.py

Lines 312 to 316 in 00686c4

	with pytest.raises(FileNotFoundError) as exc_info:
	datasets.load_dataset(SAMPLE_DATASET_NAME_THAT_DOESNT_EXIST)
	m_combined_path = re.search(fr"http\S*{re.escape(os.path.join(SAMPLE_DATASET_NAME_THAT_DOESNT_EXIST, SAMPLE_DATASET_NAME_THAT_DOESNT_EXIST + '.py'))}\b", str(exc_info.value))
	assert m_combined_path is not None and is_remote_url(m_combined_path.group())
	assert os.path.abspath(SAMPLE_DATASET_NAME_THAT_DOESNT_EXIST) in str(exc_info.value)

(though I have to change the variable name m_combined_path to m_url or something)

I guess it's ok to remove this check for now :)