remove unused resetlist

[jbrockmendel]

The "resettable" part of ResettableCache is never actually used. By removing it we make it easier to reason about the behavior of the code.

[josef-pkt]

This pull request fixes 1 alert when merging 058a007 into 5188211 - view on lgtm.com

fixed alerts:

• 1 for __eq__ not overridden when adding attributes

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Comment posted by lgtm.com

[coveralls]

Coverage decreased (-0.06%) to 84.473% when pulling 0fe5928 on jbrockmendel:resetlist into 1246e75 on statsmodels:master.

[codecov-io]

Codecov Report

Merging #4468 into master will decrease coverage by 0.45%.
The diff coverage is 95.12%.

@@            Coverage Diff             @@
##           master    #4468      +/-   ##
==========================================
- Coverage   81.98%   81.52%   -0.46%     
==========================================
  Files         588      569      -19     
  Lines       93151    89570    -3581     
  Branches    10325    10024     -301     
==========================================
- Hits        76371    73026    -3345     
+ Misses      14406    14272     -134     
+ Partials     2374     2272     -102

Impacted Files	Coverage Δ
statsmodels/tools/decorators.py	86.88% <100%> (-3.26%)	⬇️
statsmodels/stats/contingency_tables.py	86.98% <100%> (+0.31%)	⬆️
statsmodels/graphics/gofplots.py	82.35% <100%> (ø)	⬆️
statsmodels/tools/tests/test_decorators.py	90.9% <100%> (-5.1%)	⬇️
statsmodels/genmod/generalized_linear_model.py	90.7% <100%> (-0.4%)	⬇️
statsmodels/nonparametric/kde.py	85.81% <100%> (ø)	⬆️
statsmodels/base/model.py	85.86% <100%> (-1.45%)	⬇️
statsmodels/tsa/arima_model.py	86.44% <100%> (-0.43%)	⬇️
...smodels/genmod/generalized_estimating_equations.py	83.1% <100%> (+0.22%)	⬆️
statsmodels/tsa/statespace/mlemodel.py	85.96% <100%> (-0.23%)	⬇️
... and 202 more

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[jbrockmendel]

@josef-pkt this is an area where I have strong comparative advantage: willingness to figure out what "plumbing" parts of code are actually needed.

[bashtage]

Needs a rebase.