Deprecate inplace in Categorical.remove_unused_categories#37918

Merged

jreback merged 5 commits intopandas-dev:masterfrom

OlehKSS:issue-37643

Nov 18, 2020

Commits on Nov 17, 2020

Deprecate inplace in Categorical.remove_unused_categories.
Oleh Kozynets
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Add whatsnew entry.
Oleh Kozynets
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Commits on Nov 18, 2020

Code review changes.
Oleh Kozynets
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Fix CI.
Oleh Kozynets
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Fix line length.
Oleh Kozynets
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