Remove `Rails.env.test?` from production code

app/workers/repository_check/batch_worker.rb

@@ -15,7 +15,7 @@ module RepositoryCheck
       # check, only one (or two) will be checked at a time.
       project_ids.each do |project_id|
         break if Time.now - start >= RUN_TIME
-        break unless current_settings.repository_checks_enabled
+        break unless Gitlab::CurrentSettings.repository_checks_enabled
 
         next unless try_obtain_lease(project_id)
 
@@ -47,16 +47,5 @@ module RepositoryCheck
         timeout: 24.hours
       ).try_obtain
     end
-
-    def current_settings
-      # No caching of the settings! If we cache them and an admin disables
-      # this feature, an active RepositoryCheckWorker would keep going for up
-      # to 1 hour after the feature was disabled.
-      if Rails.env.test?
-        Gitlab::CurrentSettings.fake_application_settings
-      else
-        ApplicationSetting.current
-      end
-    end
   end
 end

spec/workers/repository_check/batch_worker_spec.rb

@@ -31,8 +31,8 @@ describe RepositoryCheck::BatchWorker do
 
   it 'does nothing when repository checks are disabled' do
     create(:project, created_at: 1.week.ago)
-    current_settings = double('settings', repository_checks_enabled: false)
-    expect(subject).to receive(:current_settings) { current_settings }
+
+    stub_application_setting(repository_checks_enabled: false)
 
     expect(subject.perform).to eq(nil)
   end