Moved project configs to infra/config branch

luci-config has been switched to read from
https://chromium.googlesource.com/external/webrtc/+/infra/config

R=machenbach@chromium.org, phajdan.jr@chromium.org,
kjellander@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=513460

Review URL: https://codereview.webrtc.org/1255883005

Cr-Commit-Position: refs/heads/master@{#9689}
2 files changed