[Translate metrics cleanup] Remove Translate.Ranker.QueryResult code

OBSOLETE_HISTOGRAM[Translate.Ranker.QueryResult]=Replaced by Translate.PageLoad.Ranker.Decision in M115

Bug: 1266978
Change-Id: Iede364d0e5a95ec58d3fe1577e0196cfffe62671
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4544427


Reviewed-by: Basia Zimirska <basiaz@google.com>
Reviewed-by: Max Curran <curranmax@chromium.org>
Commit-Queue: Anthony Cui <cuianthony@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1147406}