Revert of add a Chrome builder to the CQ (patchset #1 id:1 of https://codereview.chromium.org/2085333002/ )

Reason for revert:
Reverting due to purple trybots in https://codereview.chromium.org/2087343002/

We will have to investigate..

Original issue's description:
> add a Chrome builder to the CQ
>
> This appears to be the fastest Chrome builder, averaging 8-9 minutes.
>
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2085333002
>
> Committed: https://skia.googlesource.com/skia/+/cb4efa90ab5f6ea7cf5e0f44aec6f4e6418aad3d

TBR=reed@google.com,mtklein@google.com,mtklein@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review-Url: https://codereview.chromium.org/2087913003
diff --git a/infra/branch-config/cq.cfg b/infra/branch-config/cq.cfg
index 008da6f..504b1c7 100644
--- a/infra/branch-config/cq.cfg
+++ b/infra/branch-config/cq.cfg
@@ -47,11 +47,6 @@
       name: "client.skia.fyi"
       builders { name: "skia_presubmit-Trybot" }
     }
-    buckets {
-      name: "master.tryserver.chromium.mac"
-      # At time of writing, this is the fastest Chrome compile bot on average.
-      builders { name: "mac_chromium_compile_dbg_ng" }
-    }
     try_job_retry_config {
       try_job_retry_quota: 1
       global_retry_quota: 2