[cq.cfg] Remove cq.cfg.

It has been replaced by commit-queue.cfg in infra/config branch: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

Bug: skia:8715
Change-Id: I3b8bd34a43ca01144c8f55da93ed38124877a7bc
Reviewed-on: https://skia-review.googlesource.com/c/188324
Reviewed-by: Eric Boren <borenet@google.com>
2 files changed