chromeos_config: stop alerting chromeos-build-alerts on canary master

BUG=None
TEST=None

Change-Id: Ic8031ff7e4b9c4a3554173c06ba1c1a842286f32
Reviewed-on: https://chromium-review.googlesource.com/420304
Commit-Ready: Aviv Keshet <akeshet@chromium.org>
Tested-by: Aviv Keshet <akeshet@chromium.org>
Reviewed-by: Prathmesh Prabhu <pprabhu@chromium.org>
diff --git a/cbuildbot/chromeos_config.py b/cbuildbot/chromeos_config.py
index 9d798bd..ab4d920 100644
--- a/cbuildbot/chromeos_config.py
+++ b/cbuildbot/chromeos_config.py
@@ -2889,8 +2889,7 @@
       master=True,
       sync_chrome=False,
       chrome_sdk=False,
-      health_alert_recipients=['chromeos-infra-eng@grotations.appspotmail.com',
-                               'tree'],
+      health_alert_recipients=['tree'],
       afdo_use=False,
       branch_util_test=True,
   )
diff --git a/cbuildbot/config_dump.json b/cbuildbot/config_dump.json
index 3e9b51d..3650375 100644
--- a/cbuildbot/config_dump.json
+++ b/cbuildbot/config_dump.json
@@ -14366,7 +14366,6 @@
         "buildslave_type": "gce_wimpy",
         "chrome_sdk": false,
         "health_alert_recipients": [
-            "chromeos-infra-eng@grotations.appspotmail.com",
             "tree"
         ],
         "master": true,