diff --git a/lib/util.js b/lib/util.js
index 2ac48c0c..7b74d293 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -20,8 +20,6 @@ const getSystemInfo = () => {
   };
 };
 
-const clean = args => args.filter(arg => arg != null);
-
 const format = (template = '', context = {}) => {
   try {
     return _.template(template)(context);
@@ -95,7 +93,6 @@ const e = (message, docs) => new Error(docs ? `${message}${EOL}Documentation: ${
 
 export {
   getSystemInfo,
-  clean,
   format,
   truncateLines,
   rejectAfter,