Remove Rietveld CQ config.

Rietveld CQ has already been disabled and is no longer supoorted.

R=agable@chromium.org
TBR=binji@chromium.org

No-Try: True
Bug: 770592
Change-Id: I6afe55e8870e514695e1b97f0dcf7a249668ddf8
Reviewed-on: https://chromium-review.googlesource.com/714490
Reviewed-by: Aaron Gable <agable@chromium.org>
Commit-Queue: Andrii Shyshkalov <tandrii@chromium.org>

infra/config/cq.cfg

diff --git a/infra/config/cq.cfg b/infra/config/cq.cfg
index 327c593..ebb3c52 100644
--- a/infra/config/cq.cfg
+++ b/infra/config/cq.cfg
@@ -7,16 +7,8 @@
 git_repo_url: "https://chromium.googlesource.com/webports.git"
 
 gerrit {}
-rietveld {
-  url: "https://codereview.chromium.org"
-}
-
 
 verifiers {
-  reviewer_lgtm {
-    committer_list: "project-chromium-committers"
-    dry_run_access_list: "project-chromium-tryjob-access"
-  }
   gerrit_cq_ability {
     committer_list: "project-chromium-committers"
     dry_run_access_list: "project-chromium-tryjob-access"