diff --git a/src/engine/comment.js b/src/engine/comment.js
index c18014c70..ac644e770 100644
--- a/src/engine/comment.js
+++ b/src/engine/comment.js
@@ -4,7 +4,6 @@
  */
 
 const uid = require('../util/uid');
-const Cast = require('../util/cast');
 const xmlEscape = require('../util/xml-escape');
 
 class Comment {