Take win_chromium_x64_rel_ng out of the CQ temporarily.

More troubleshooting/workarounds for the golo network issues.

TBR=hinoka@chromium.org
NOTRY=true
NOPRESUBMIT=true
NOTREECHECKS=true
BUG=753184

Change-Id: Ia5b690746782bcf337e19198cf662459ebb9fc73
Reviewed-on: https://chromium-review.googlesource.com/611031
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: Dirk Pranke <dpranke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#493503}

infra/config/cq.cfg

@@ -94,6 +94,7 @@ verifiers {
       name: "master.tryserver.chromium.win"
       builders { name: "win_chromium_compile_dbg_ng" }
       builders { name: "win_chromium_rel_ng" }
+      # crbug.com/753184 - take out of the CQ temporarily.
       builders { name: "win_chromium_x64_rel_ng" }
       builders { name: "win_clang" }
     }