Disable backup alerting rules for now

alerts/gitlab-backup.rules

-gitlab_com:last_backup_age_in_seconds=(time()-gitlab_com_backup_time)
-ALERT gitlab_com_backup_too_old
-  IF gitlab_com:last_backup_age_in_seconds >= 36*60*60
-  FOR 30s
-  LABELS { severity = "critical" }
-  ANNOTATIONS {
-    title = "Regular backup for GitLab.com was taken more than {{ .Value | humanizeDuration }} ago. Please take the actions or in case of accident we could lose data.",
-    description = "Regular backups for GitLab.com are not taken on time. Please follow the runbook to review the problem.",
-    runbook="troubleshooting/gitlab_com_backups.md"
-  }
+# gitlab_com:last_backup_age_in_seconds=(time()-gitlab_com_backup_time)
+# ALERT gitlab_com_backup_too_old
+#   IF gitlab_com:last_backup_age_in_seconds >= 36*60*60
+#   FOR 30s
+#   LABELS { severity = "critical" }
+#   ANNOTATIONS {
+#     title = "Regular backup for GitLab.com was taken more than {{ .Value | humanizeDuration }} ago. Please take the actions or in case of accident we could lose data.",
+#     description = "Regular backups for GitLab.com are not taken on time. Please follow the runbook to review the problem.",
+#     runbook="troubleshooting/gitlab_com_backups.md"
+#   }