CLN: PY2/3 builtin, httplib

[mroeschke]

• xref CLN: remove PY2 #25725
• tests added / passed
• passes git diff upstream/master -u -- "*.py" | flake8 --diff

Also

• Removed pandas.compat.itertools.product for itertools.product

[codecov]

Codecov Report

Merging #25981 into master will decrease coverage by 49.94%.
The diff coverage is 92.3%.

@@             Coverage Diff             @@
##           master   #25981       +/-   ##
===========================================
- Coverage   91.85%    41.9%   -49.95%     
===========================================
  Files         175      175               
  Lines       52554    52543       -11     
===========================================
- Hits        48272    22020    -26252     
- Misses       4282    30523    +26241

Flag	Coverage Δ
#multiple	?
#single	41.9% <92.3%> (-0.08%)	⬇️

Impacted Files	Coverage Δ
pandas/core/reshape/util.py	85% <ø> (-15%)	⬇️
pandas/core/base.py	33.92% <100%> (-63.86%)	⬇️
pandas/util/testing.py	50.79% <100%> (-39.83%)	⬇️
pandas/compat/__init__.py	60.83% <87.5%> (-13.61%)	⬇️
pandas/io/formats/latex.py	0% <0%> (-100%)	⬇️
pandas/io/sas/sas_constants.py	0% <0%> (-100%)	⬇️
pandas/tseries/plotting.py	0% <0%> (-100%)	⬇️
pandas/tseries/converter.py	0% <0%> (-100%)	⬇️
pandas/io/formats/html.py	0% <0%> (-99.36%)	⬇️
pandas/core/groupby/categorical.py	0% <0%> (-95.46%)	⬇️
... and 134 more

---

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[codecov]

Codecov Report

Merging #25981 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master   #25981      +/-   ##
==========================================
+ Coverage   91.85%   91.85%   +<.01%     
==========================================
  Files         175      175              
  Lines       52554    52543      -11     
==========================================
- Hits        48272    48262      -10     
+ Misses       4282     4281       -1

Flag	Coverage Δ
#multiple	90.4% <100%> (ø)	⬆️
#single	41.9% <92.3%> (-0.08%)	⬇️

Impacted Files	Coverage Δ
pandas/core/reshape/util.py	100% <ø> (ø)	⬆️
pandas/compat/__init__.py	75.83% <100%> (+1.39%)	⬆️
pandas/core/base.py	97.78% <100%> (ø)	⬆️
pandas/util/testing.py	90.62% <100%> (ø)	⬆️
pandas/io/gbq.py	75% <0%> (-12.5%)	⬇️
pandas/core/frame.py	96.79% <0%> (-0.12%)	⬇️

---

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[jreback]

we want to completely remove these at some point as well

[mroeschke]

Right. Just moving for now since their PY2 versions used builtin

[jreback]

thanks