Backport PR #38649 on branch 1.2.x (BUG: Fix regression for groupby.indices in case of unused categories)#38790

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simonjayhawkins merged 1 commit intopandas-dev:1.2.xfrom meeseeksmachine:auto-backport-of-pr-38649-on-1.2.x

Dec 30, 2020

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Commits on Dec 29, 2020

Backport PR pandas-dev#38649 : BUG: Fix regression for groupby.indices in case of unused categories

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