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Also clean up some other migrated builders.

BUG=793905,793907,793908,793914,793944,793913

Change-Id: I0a047112e0cf319bb00ad45f2c8441d96060ca67
Reviewed-on: https://chromium-review.googlesource.com/1056467Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>
Commit-Queue: Jao-ke Chin-Lee <jchinlee@chromium.org>
Cr-Commit-Position: refs/heads/master@{#558386}