bpo-39796: _PyWarnings_Init() in pylifecycle.c could be removed

[shihai1991]

https://bugs.python.org/issue39796

[codecov]

Codecov Report

Merging #18700 into master will increase coverage by 1.00%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master   #18700       +/-   ##
===========================================
+ Coverage   82.21%   83.22%    +1.00%     
===========================================
  Files        1958     1571      -387     
  Lines      590365   415242   -175123     
  Branches    44483    44484        +1     
===========================================
- Hits       485384   345593   -139791     
+ Misses      95316    60002    -35314     
+ Partials     9665     9647       -18     

Impacted Files	Coverage Δ
Lib/distutils/tests/test_bdist_rpm.py	30.00% <0.00%> (-65.00%)	⬇️
Lib/distutils/command/bdist_rpm.py	7.63% <0.00%> (-56.88%)	⬇️
Lib/test/test_urllib2net.py	76.92% <0.00%> (-13.85%)	⬇️
Lib/test/test_smtpnet.py	78.57% <0.00%> (-12.86%)	⬇️
Lib/ftplib.py	63.85% <0.00%> (-6.06%)	⬇️
Lib/test/test_ftplib.py	87.11% <0.00%> (-4.72%)	⬇️
Lib/dbm/__init__.py	66.66% <0.00%> (-4.45%)	⬇️
Tools/scripts/db2pickle.py	17.82% <0.00%> (-3.97%)	⬇️
Lib/test/test_socket.py	71.94% <0.00%> (-3.87%)	⬇️
Tools/scripts/pickle2db.py	16.98% <0.00%> (-3.78%)	⬇️
... and 431 more

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[vstinner]

Calling _PyWarnings_Init() looks wrong, but the PR also looks wrong.

[bedevere-bot]

A Python core developer has requested some changes be made to your pull request before we can consider merging it. If you could please address their requests along with any other requests in other reviews from core developers that would be appreciated.

Once you have made the requested changes, please leave a comment on this pull request containing the phrase I have made the requested changes; please review again. I will then notify any core developers who have left a review that you're ready for them to take another look at this pull request.

[vstinner]

I merged my PR #18739 instead.