Merge pull request #5604 from rmosolgo/fix-system-tests

Fix system tests on CI

Author: rmosolgo

spec/dummy/app/assets/javascripts/application.js

@@ -10,7 +10,6 @@
 // Read Sprockets README (https://github.com/rails/sprockets#sprockets-directives) for details
 // about supported directives.
 //
-//= require rails-ujs
 // Action Cable provides the framework to deal with WebSockets in Rails.
 // You can generate new channels where WebSocket features live using the `rails generate channel` command.
 //