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Revert "Add support for Tooltip hover (#31561)" (#31692)

This reverts commit eca93640697f4ed4b37bf8d0817c15b5f9ca4575 because of four
performance regressions. Will fix and re-land.
G
Greg Spencer committed
7565093f3e31afe8a97e75dd00268c027c748bd2
Parent: 6ed442a
Committed by GitHub <noreply@github.com> on 4/26/2019, 9:29:19 PM