Tweak the package.json require statement

server/server.js

@@ -33,12 +33,7 @@ function allLangs() {
 }
 
 function prodLangs() {
-  // eslint-disable-next-line security/detect-non-literal-require
+  return require('../package.json').availableLanguages.join(',');
-  return require(path.join(
-    __dirname,
-    '..',
-    'package.json'
-  )).availableLanguages.join(',');
 }
 
 const availableLanguages = conf.l10n_dev ? allLangs() : prodLangs();