Merge pull request #40253 from ohbarye/remove-obsolete-comment

Remove obsolete comment [skip ci]

actionpack/lib/action_dispatch/testing/assertions/routing.rb

@@ -91,7 +91,6 @@ def assert_generates(expected_path, options, defaults = {}, extras = {}, message
         else
           expected_path = "/#{expected_path}" unless expected_path.start_with?("/")
         end
-        # Load routes.rb if it hasn't been loaded.
 
         options = options.clone
         generated_path, query_string_keys = @routes.generate_extras(options, defaults)