fix(deprecation): remove obsolete dedupe plugin

see #12

etc/webpack.prod.js

@@ -16,7 +16,6 @@ const ProvidePlugin = webpack.ProvidePlugin;
 const DefinePlugin = webpack.DefinePlugin;
 const NormalModuleReplacementPlugin = webpack.NormalModuleReplacementPlugin;
 const IgnorePlugin = webpack.IgnorePlugin;
-const DedupePlugin = webpack.optimize.DedupePlugin;
 const UglifyJsPlugin = webpack.optimize.UglifyJsPlugin;
 const WebpackMd5Hash = require('webpack-md5-hash');
 
@@ -109,16 +108,6 @@ module.exports = webpackMerge(commonConfig, {
      */
     new WebpackMd5Hash(),
 
-    /**
-     * Plugin: DedupePlugin
-     * Description: Prevents the inclusion of duplicate code into your bundle
-     * and instead applies a copy of the function at runtime.
-     *
-     * See: https://webpack.github.io/docs/list-of-plugins.html#defineplugin
-     * See: https://github.com/webpack/docs/wiki/optimization#deduplication
-     */
-    new DedupePlugin(),
-
     /**
      * Plugin: DefinePlugin
      * Description: Define free variables.