use_sprockets is not used anymore

actionpack/lib/action_view/helpers/asset_tag_helpers/javascript_tag_helpers.rb

@@ -83,11 +83,7 @@ def register_javascript_expansion(expansions)
         #   javascript_path "http://www.example.com/js/xmlhr"    # => http://www.example.com/js/xmlhr
         #   javascript_path "http://www.example.com/js/xmlhr.js" # => http://www.example.com/js/xmlhr.js
         def javascript_path(source)
-          if config.use_sprockets
-            asset_path(source, 'js')
-          else
-            asset_paths.compute_public_path(source, 'javascripts', 'js')
-          end
+          asset_paths.compute_public_path(source, 'javascripts', 'js')
         end
         alias_method :path_to_javascript, :javascript_path # aliased to avoid conflicts with a javascript_path named route