Drop mock_use_standalone_module

[eclipseo]

Mock is integrated to Python as unittest.mock since version 3.6 so importing mock is no longer necessary.

See https://github.com/testing-cabal/mock/blob/master/README.rst
and https://github.com/pytest-dev/pytest-mock/blob/main/src/pytest_mock/_util.py#L17

[codecov-commenter]

Codecov Report

Merging #155 (d33fab7) into master (44f5b0a) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #155   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           33        33           
  Lines         1079      1079           
=========================================
  Hits          1079      1079           

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[xflr6]

Thanks for the PR.

We use https://pypi.org/project/mock/ in tests in order to make use of the latest mock features across Python versions:

This package contains a rolling backport of the standard library mock code compatible with Python 3.6 and up.

See the failing tests under Python 3.7 from mock.call_args.kwargs added in Python 3.8.