The CompareOperationFeedback documentation was outdated and there was an
invalid TODO on it that suggested to unify this with the
BinaryOperationFeedback which in retrospect doesn't make a lot of sense.

Bug: v8:7109
Change-Id: Ibf748e242db55430f29d305f1ef1df6d44449481
Reviewed-on: https://chromium-review.googlesource.com/819090Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49990}