Don't return collections along with simple settings

lib/travis/api/app/endpoint/repos.rb

@@ -46,7 +46,7 @@ class Travis::Api::App
       get '/:id/settings', scope: :private do
         settings = service(:find_repo_settings, params).run
         if settings
-          respond_with({ settings: settings.obfuscated }, version: :v2)
+          respond_with({ settings: settings.simple_attributes }, version: :v2)
         else
           status 404
         end

spec/integration/v2/repositories_spec.rb

@@ -51,6 +51,7 @@ describe 'Repos' do
     it 'allows to get settings' do
       response = get "repos/#{repo.id}/settings", {}, headers
       JSON.parse(response.body)['settings'].should have_key('build_pushes')
+      JSON.parse(response.body)['settings'].should_not have_key('env_vars')
     end
   end