Revert "Merge branch 'arun-update-o11y-alerts-worker' into 'master'"

This reverts merge request !167441

ee/app/models/gitlab_subscriptions/features.rb

@@ -42,7 +42,6 @@ class Features
       product_analytics_usage_quotas
       zoekt_code_search
       disable_private_profiles
-      observability
     ].freeze
 
     STARTER_FEATURES = %i[

ee/app/workers/observability/alert_query_worker.rb

@@ -12,8 +12,6 @@ class AlertQueryWorker
     worker_has_external_dependencies!
 
     def perform
-      return unless License.feature_available?(:observability)
-
       api_response = fetch_alerts
       return unless api_response