Delete ProfileSyncServiceMock

It's unused now :)

Bug: 910518
Change-Id: Ibeab6a3edf4629b367ef0695ec636d802fe8ad8b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1529103
Commit-Queue: Marc Treib <treib@chromium.org>
Auto-Submit: Marc Treib <treib@chromium.org>
Reviewed-by: Mohamed Amir Yosef <mamir@chromium.org>
Cr-Commit-Position: refs/heads/master@{#642451}
3 files changed