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Revert "Reland "Measure iOS CPU/GPU percentage (#41234)" (#41426)" (#41575)

This reverts commit 67b5bdf99b19e5f04bae5fb82af91aa695fbfbb9.

Reason: it broke device lab.

TBR: @goderbauer
L
liyuqian committed
baea9bf7cc7447b5ec6e6d377a68b17e79cb9ccf
Parent: 67b5bdf
Committed by GitHub <noreply@github.com> on 9/29/2019, 5:58:13 PM