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I think it is sufficient to specify dimensions_sets only in builders
config.
No behavior change intended.

Change-Id: I36c50d22f5d5b56f49d54c838848eb59565b7a00
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1735451
Commit-Queue: Ben Pastene <bpastene@chromium.org>
Reviewed-by: Ben Pastene <bpastene@chromium.org>
Auto-Submit: Takuto Ikuta <tikuta@chromium.org>
Cr-Commit-Position: refs/heads/master@{#684006}