Remove references to phajdan.jr

Bug: 783662
Cq-Include-Trybots: master.tryserver.chromium.android:android_cronet_tester;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: If14081b9b17a3502435d2f2c4fcccfbbe51ae813
Reviewed-on: https://chromium-review.googlesource.com/763447
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#515954}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 064792ea9aa1864fad96841c7bffd206478b6b9e