Frontend - simplify Warden configuration

engines/frontend/lib/dradis/frontend/engine.rb

@@ -15,22 +15,14 @@ class Engine < ::Rails::Engine
         app.config.assets.precompile += ["dradis/frontend/manifests/*"]
       end
 
+      # Install the Warden middleware in the application's stack. We use our own
+      # shared password strategy.
       initializer 'frontend.warden' do |app|
-
         Rails.configuration.middleware.use Warden::Manager do |manager|
           manager.default_strategies :shared_password
           manager.failure_app = ->(env){ SessionsController.action(:new).call(env) }
         end
 
-        # FIXME: do we need these two?
-        #Warden::Manager.serialize_into_session do |user|
-        #  user
-        #end
-        #
-        #Warden::Manager.serialize_from_session do |id|
-        #  id
-        #end
-
         Warden::Strategies.add(:shared_password, Dradis::Frontend::WardenStrategy)
       end
     end