Remove both rietveld config and review_lgtm setting from cq config

tools/infra/config/cq.cfg

Index: tools/infra/config/cq.cfg
diff --git a/tools/infra/config/cq.cfg b/tools/infra/config/cq.cfg
index 8062132e36b58379bd26cf1d91cf7e63506e04e6..5d976cbaf74219116a0465607a9525085cbf4b3f 100644
--- a/tools/infra/config/cq.cfg
+++ b/tools/infra/config/cq.cfg
@@ -3,22 +3,15 @@
 version: 1
 cq_name: "dart"
 git_repo_url: "https://dart.googlesource.com/sdk.git"
-rietveld {
-  url: "https://codereview.chromium.org"
-}
 gerrit { }
 verifiers {
-  reviewer_lgtm {
-     committer_list: "dart-team"
-     dry_run_access_list: "dart-team"
-  }
   gerrit_cq_ability {
-     committer_list: "dart-team"
-     dry_run_access_list: "dart-team"
+     committer_list: "project-dart-committers"
+     dry_run_access_list: "project-dart-tryjob-access"
   }
   try_job {
     buckets {
-      name: "tryserver.client.dart"
+      name: "master.tryserver.client.dart"
       builders { name: "vm-win-debug-x64-try"}
       builders { name: "vm-win-release-x64-try"}
       builders { name: "vm-linux-debug-x64-try"}