Merge pull request #3115 from guilleiguaran/refactor-rails-helpers

Remove Sprockets compute_public_path, AV compute_plubic_path can be used

actionpack/lib/sprockets/helpers/rails_helper.rb

@@ -13,7 +13,6 @@ def asset_paths
           controller = self.controller if respond_to?(:controller)
           paths = RailsHelper::AssetPaths.new(config, controller)
           paths.asset_environment = asset_environment
-          paths.asset_prefix      = asset_prefix
           paths.asset_digests     = asset_digests
           paths.compile_assets    = compile_assets?
           paths.digest_assets     = digest_assets?
@@ -102,10 +101,6 @@ class AssetPaths < ::ActionView::AssetPaths #:nodoc:
 
         class AssetNotPrecompiledError < StandardError; end
 
-        def compute_public_path(source, dir, options = {})
-          super(source, asset_prefix, options)
-        end
-
         # Return the filesystem path for the source
         def compute_source_path(source, ext)
           asset_for(source, ext)