pre-upload: drop duplicate branch checks

These repos enable branch checks via their PRESUBMIT.cfg, so drop them
from the hardcoded list.

BUG=chromium:466264
TEST=`./pre-upload_unittest.py` passes
TEST=uploading in one of these repos still requires BRANCH

Change-Id: Ic1cd168d81f11ad30249c9fba687cdb89be2dbc5
Reviewed-on: https://chromium-review.googlesource.com/262012
Trybot-Ready: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Steve Fung <stevefung@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
1 file changed