[cq.cfg] Remove cq.cfg.

It has been replaced by commit-queue.cfg in infra/config branch:
https://skia.googlesource.com/skia/+/infra/config/commit-queue.cfg

Bug: skia:8715
Change-Id: I1040da88e0ff65e0db2897d6a519622e22bdc09d
Reviewed-on: https://skia-review.googlesource.com/c/188301
Reviewed-by: Eric Boren <borenet@google.com>
2 files changed