Remove FF for environment multiple stop actions

Changelog: changed

app/models/environment.rb

@@ -314,13 +314,9 @@ def stop_with_actions!(current_user)
   def stop_actions
     strong_memoize(:stop_actions) do
-      if ::Feature.enabled?(:environment_multiple_stop_actions, project)
-        # Fix N+1 queries it brings to the serializer.
-        # Tracked in https://gitlab.com/gitlab-org/gitlab/-/issues/358780
-        last_deployment_group.map(&:stop_action).compact
-      else
-        [last_deployment&.stop_action].compact
-      end
+      # Fix N+1 queries it brings to the serializer.
+      # Tracked in https://gitlab.com/gitlab-org/gitlab/-/issues/358780
+      last_deployment_group.map(&:stop_action).compact
     end
   end

config/feature_flags/development/environment_multiple_stop_actions.yml

----
-name: environment_multiple_stop_actions
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/84922
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/358911
-milestone: '14.10'
-type: development
-group: group::release
-default_enabled: false

spec/models/environment_spec.rb

@@ -683,19 +683,6 @@
           expect(actions.count).to eq(environment.successful_deployments.count)
         end
       end
-
-      context 'when the feature is disabled' do
-        before do
-          stub_feature_flags(environment_multiple_stop_actions: false)
-        end
-
-        it 'returns the last deployment job stop action' do
-          stop_actions = subject
-
-          expect(stop_actions.first).to eq(close_actions[1])
-          expect(stop_actions.count).to eq(1)
-        end
-      end
     end
   end