Remove the feature flag for auto stop environments

This commit removes the feature flag

app/controllers/projects/environments_controller.rb

@@ -15,9 +15,6 @@ class Projects::EnvironmentsController < Projects::ApplicationController
   before_action only: [:metrics, :additional_metrics, :metrics_dashboard] do
     push_frontend_feature_flag(:prometheus_computed_alerts)
   end
-  before_action do
-    push_frontend_feature_flag(:auto_stop_environments, default_enabled: true)
-  end
   after_action :expire_etag_cache, only: [:cancel_auto_stop]
 
   def index

app/services/environments/auto_stop_service.rb

@@ -30,7 +30,7 @@ module Environments
     def stop_in_batch
       environments = Environment.auto_stoppable(BATCH_SIZE)
 
-      return false unless environments.exists? && Feature.enabled?(:auto_stop_environments, default_enabled: true)
+      return false unless environments.exists?
 
       Ci::StopEnvironmentsService.execute_in_batch(environments)
     end

app/workers/environments/auto_stop_cron_worker.rb

@@ -8,8 +8,6 @@ module Environments
     feature_category :continuous_delivery
 
     def perform
-      return unless Feature.enabled?(:auto_stop_environments, default_enabled: true)
-
       AutoStopService.new.execute
     end
   end

spec/services/environments/auto_stop_service_spec.rb

@@ -40,18 +40,6 @@ describe Environments::AutoStopService, :clean_gitlab_redis_shared_state do
       expect(Ci::Build.where(name: 'stop_review_app').map(&:status).uniq).to eq(['pending'])
     end
 
-    context 'when auto_stop_environments feature flag is disabled' do
-      before do
-        stub_feature_flags(auto_stop_environments: false)
-      end
-
-      it 'does not execute Ci::StopEnvironmentsService' do
-        expect(Ci::StopEnvironmentsService).not_to receive(:execute_in_batch)
-
-        subject
-      end
-    end
-
     context 'when the other sidekiq worker has already been running' do
       before do
         stub_exclusive_lease_taken(described_class::EXCLUSIVE_LOCK_KEY)