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Also clean up some old owners who aren't active in the code anymore.

Change-Id: Ib809d30c30c3203cb9cad16c9c643c678602b961
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1728447
Auto-Submit: Nathan Parker <nparker@chromium.org>
Commit-Queue: Varun Khaneja <vakh@chromium.org>
Reviewed-by: Varun Khaneja <vakh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#683007}