refactored code according to review

browser/lib/i18n.js

@@ -1,17 +1,12 @@
 const path = require('path')
 const { remote } = require('electron')
 const { app } = remote
-const { languages } = require('./Languages.js')
-
-let locales = languages.reduce(function (localeList, locale) {
-  localeList.push(locale.locale)
-  return localeList
-}, [])
+const { getLocales } = require('./Languages.js')
 
 // load package for localization
 const i18n = new (require('i18n-2'))({
   // setup some locales - other locales default to the first locale
-  locales: locales,
+  locales: getLocales(),
   extension: '.json',
   directory: process.env.NODE_ENV === 'production'
     ? path.join(app.getAppPath(), './locales')