Remove test-infra-oncall pings from alerts/docs.

CONTRIBUTING.md

@@ -16,7 +16,7 @@ involved are listed in [/OWNERS]. We are most responsive on our slack channel
 
 We also have three other slack channels:
 
-- [#testing-ops]: for [prow.k8s.io] and other test-infra ops. Ping `@test-infra-oncall` or check [go.k8s.io/oncall]
+- [#testing-ops]: for [prow.k8s.io] and other test-infra ops.
 - [#prow]: for discussions related to the use or development of [`prow`](/prow)
 - [#testgrid]: for discussions related to the use of development of [`testgrid`](https://github.com/GoogleCloudPlatform/testgrid)
 

config/prow/cluster/monitoring/mixins/prometheus/ci_absent_alerts.libsonnet

@@ -15,7 +15,7 @@
               slo: name,
             },
             annotations: {
-              message: '@test-infra-oncall The service %s has been down for 10 minutes.' % name,
+              message: 'The service %s has been down for 10 minutes.' % name,
             },
           }
           for name in $._config.ciAbsents.components

config/prow/cluster/monitoring/mixins/prometheus/plank_alerts.libsonnet

@@ -24,7 +24,7 @@
               slo: componentName,
             },
             annotations: {
-              message: '@test-infra-oncall The heartbeat job `%s` has not had a successful run in the past %s (should run every %s).' % [job.name, job.alertInterval, job.interval],
+              message: 'The heartbeat job `%s` has not had a successful run in the past %s (should run every %s).' % [job.name, job.alertInterval, job.interval],
             },
           }
           for job in $._config.heartbeatJobs

config/prow/cluster/monitoring/secrets/alertmanager-prow_secret.yaml

@@ -37,14 +37,14 @@ stringData:
       - channel: '#prow-alerts'
         api_url: '{{ api_url }}'
         icon_url: https://avatars3.githubusercontent.com/u/3380462
-        text: '@test-infra-oncall {{ template "custom_slack_text" . }}'
+        text: '{{ template "custom_slack_text" . }}'
         link_names: true
     - name: 'slack-alerts'
       slack_configs:
       - channel: '#testing-ops'
         api_url: '{{ api_url }}'
         icon_url: https://avatars3.githubusercontent.com/u/3380462
-        text: '@test-infra-oncall {{ template "custom_slack_text" . }}'
+        text: '{{ template "custom_slack_text" . }}'
         link_names: true
     - name: 'cluster-api-aws-alerts'
       slack_configs: