Revert of Fix PRESUBMIT.py after disabling CQ. (patchset #1 id:1 of https://codereview.webrtc.org/1192673003/)
Revert of Fix PRESUBMIT.py after disabling CQ. (patchset #1 id:1 of https://codereview.webrtc.org/1192673003/)

Reason for revert:
CQ-Rietveld combination now supports webrtc custom domain.

Original issue's description:
> Fix PRESUBMIT.py after disabling CQ.
>
> The disabling of CQ in https://codereview.webrtc.org/1177243003/
> broke PRESUBMIT.py since it's trying to read cq.cfg.
>
> BUG=501332
> TBR=phoglund@webrtc.org
>
> Committed: https://chromium.googlesource.com/external/webrtc/+/141725f50fa4223ce2f9e84500971a44d7720c03

TBR=phoglund@webrtc.org,kjellander@webrtc.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=501332

Review URL: https://codereview.webrtc.org/1190283003

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#9476}

ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc