Undos a hack added while CQ for branches was experimental.

R=ehmaldonado

Bug: 1043225, 753213
Change-Id: Ie88b61e61f59e828f0ac4a36cf4e356700305482
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2011308
Auto-Submit: Andrii Shyshkalov <tandrii@google.com>
Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>
Reviewed-by: Edward Lesmes <ehmaldonado@chromium.org>