CLN: Remove miscellaneous rarely used items from pandas.compat

[jschendel]

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

Gets rid of the following from pandas.compat:

• intern
• reduce
• unichr
• wraps
• get_range_parameters
• class_types
• reload
  • also removed set_defaultencoding as it used reload, was never used, and is PY2 specific
• import_lzma
  • also removed skip_if_no_lzma since lzma is in the standard library for PY3

[codecov]

Codecov Report

Merging #25873 into master will decrease coverage by 49.64%.
The diff coverage is 66.66%.

@@             Coverage Diff             @@
##           master   #25873       +/-   ##
===========================================
- Coverage   91.48%   41.83%   -49.65%     
===========================================
  Files         175      175               
  Lines       52881    52826       -55     
===========================================
- Hits        48376    22102    -26274     
- Misses       4505    30724    +26219

Flag	Coverage Δ
#multiple	?
#single	41.83% <66.66%> (ø)	⬆️

Impacted Files	Coverage Δ
pandas/compat/__init__.py	54.83% <ø> (-5.17%)	⬇️
pandas/io/common.py	43.79% <0%> (-29.07%)	⬇️
pandas/io/formats/html.py	0% <0%> (-99.36%)	⬇️
pandas/io/formats/excel.py	14.93% <100%> (-82.47%)	⬇️
pandas/core/computation/expr.py	62.84% <100%> (-25.69%)	⬇️
pandas/core/computation/common.py	65% <100%> (-24.48%)	⬇️
pandas/util/_test_decorators.py	88.23% <100%> (-2.31%)	⬇️
pandas/core/internals/construction.py	64.61% <100%> (-31.3%)	⬇️
pandas/core/indexes/range.py	52.58% <100%> (-44.83%)	⬇️
pandas/util/testing.py	50.26% <50%> (-39.48%)	⬇️
... and 140 more

---

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[codecov]

Codecov Report

Merging #25873 into master will increase coverage by 0.06%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master   #25873      +/-   ##
==========================================
+ Coverage   91.47%   91.53%   +0.06%     
==========================================
  Files         175      175              
  Lines       52863    52808      -55     
==========================================
- Hits        48357    48339      -18     
+ Misses       4506     4469      -37

Flag	Coverage Δ
#multiple	90.09% <100%> (+0.05%)	⬆️
#single	41.82% <82.6%> (+0.01%)	⬆️

Impacted Files	Coverage Δ
pandas/compat/__init__.py	65.59% <ø> (+5.59%)	⬆️
pandas/io/formats/excel.py	97.4% <100%> (ø)	⬆️
pandas/core/computation/expr.py	88.52% <100%> (ø)	⬆️
pandas/io/common.py	72.86% <100%> (ø)	⬆️
pandas/util/testing.py	90.56% <100%> (+0.83%)	⬆️
pandas/core/computation/common.py	90% <100%> (+0.52%)	⬆️
pandas/io/formats/html.py	99.35% <100%> (ø)	⬆️
pandas/util/_test_decorators.py	92.64% <100%> (+2.1%)	⬆️
pandas/core/internals/construction.py	95.89% <100%> (-0.02%)	⬇️
pandas/core/indexes/range.py	97.41% <100%> (ø)	⬆️
... and 1 more

---

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[WillAyd]

lgtm - nice job!

[jreback]

if you can move the indicated imports to the top. ping on green.

[jschendel]

@jreback: green

[jreback]

can you merge master. lgtm. merge on green.

[gfyoung]

Thanks @jschendel !