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Removes dead and unnecessary code.

Bug: 818198
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: I468a5018ec794b4c921f569362d37f1da3d1d6a5
Reviewed-on: https://chromium-review.googlesource.com/963319Reviewed-by: Sergio Collazos <sczs@chromium.org>
Reviewed-by: edchin <edchin@chromium.org>
Commit-Queue: edchin <edchin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#543253}