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This is a simple code cleanup. These methods were already deprecated and empty.

TBR=bartfab@chromium.org,rockot@chromium.org,avi@chromium.org,dpranke@chromium.org,groby@chromium.org,pwnall@chromium.org,oshima@chromium.org,agrieve@chromium.org,stevenjb@chromium.org,halliwell@chromium.org,juliatuttle@chromium.org,treib@chromium.org,yfriedman@chromium.org,asvitkine@chromium.org,sdefresne@chromium.org,wolenetz@chromium.org,pauljensen@chromium.org,gene@chromium.org,csharrison@chromium.org,pfeldman@chromium.org,blundell@chromium.org,borisv@chromium.org

Cq-Include-Trybots: master.tryserver.chromium.android:android_cronet_tester;master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: I658a4a8370fc423f1afd60ca5e943a4c8b511417
Bug: 
Reviewed-on: https://chromium-review.googlesource.com/846651
Commit-Queue: François Degros <fdegros@chromium.org>
Reviewed-by: Julia Tuttle <juliatuttle@chromium.org>
Reviewed-by: Victor Costan <pwnall@chromium.org>
Reviewed-by: Charlie Harrison <csharrison@chromium.org>
Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Reviewed-by: agrieve <agrieve@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Reviewed-by: Bartosz Fabianowski <bartfab@chromium.org>
Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
Reviewed-by: Luke Halliwell <halliwell@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Cr-Commit-Position: refs/heads/master@{#527562}