Remove iOS Translate Event Logging in Sync

The feature is disabled by default, no config currently applies, and it
was decided to stop collecting these events. This removes the iOS
portion of the code because it allows removing a translate -> sync
dependency that was preventing another change from landing.

Bug: 896719,911781
Change-Id: I54c40dc1154bb6619d876dbd3fc86e3d22078e99
Reviewed-on: https://chromium-review.googlesource.com/c/1361927
Reviewed-by: Roger McFarlane <rogerm@chromium.org>
Reviewed-by: David Roger <droger@chromium.org>
Commit-Queue: anthonyvd <anthonyvd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#614385}
2 files changed