simplify config entry

webpack.config.js

@@ -71,15 +71,11 @@ module.exports = {
                 // riot-web/webapp/i18n during build by copy-res.js
                 test: /\.*languages.json$/,
                 type: "javascript/auto",
-                use: [
-                    {
                 loader: 'file-loader',
                 options: {
                     name: 'i18n/[name].[hash:7].[ext]',
                 },
             },
-                ],
-            },
             {
                 test: /\.(gif|png|svg|ttf|xml|ico)$/,
                 // Use a content-based hash in the name so that we can set a long cache