How to prevent Rails controller generator to modify config/routes.rb

Sometimes I run a command like rails g controller foo index to generate skeletons for controller and template.

Because I don't want to have helpers and assets for every controller, I put following codes into config/application.rb:

config.generators do |g|
  g.helper false
  g.assets false
end

There is another thing I don't want to happen. The generator adds a line get "foo/index" to my config/routes.rb. How can I prevent it?