Revert "BUG: fix union_indexes not supporting sort=False for Index subclasses"#35277

Merged

jreback merged 1 commit intomasterfrom

revert-35098-append-err-sort

Jul 15, 2020

Commits on Jul 14, 2020

Revert "BUG: fix union_indexes not supporting sort=False for Index subclasses (#35098)"
TomAugspurger
authored