remove unused methods until needed

lib/gitlab/webpack/manifest.rb

@@ -3,32 +3,10 @@ require 'webpack/rails/manifest'
 module Gitlab
   module Webpack
     class Manifest < ::Webpack::Rails::Manifest
-      # Raised if webpack couldn't build one of your assets
-      class WebpackError < StandardError
-        def initialize(errors)
-          super "Error in webpack compile, details follow below:\n#{errors.join("\n\n")}"
-        end
-      end
-
       # Raised if a supplied asset does not exist in the webpack manifest
       AssetMissingError = Class.new(StandardError)
 
       class << self
-        def asset_paths(source)
-          raise ::Webpack::Rails::Manifest::WebpackError, manifest["errors"] unless manifest_bundled?
-
-          paths = manifest["assetsByChunkName"][source]
-          if paths
-            # Can be either a string or an array of strings.
-            # Do not include source maps as they are not javascript
-            [paths].flatten.reject { |p| p =~ /.*\.map$/ }.map do |p|
-              "/#{::Rails.configuration.webpack.public_path}/#{p}"
-            end
-          else
-            raise AssetMissingError, "Can't find asset '#{source}' in webpack manifest"
-          end
-        end
-
         def entrypoint_paths(source)
           raise ::Webpack::Rails::Manifest::WebpackError, manifest["errors"] unless manifest_bundled?