diff --git a/apidoc/plugins/observable.js b/apidoc/plugins/observable.js
index dc05934772..b0b35c906c 100644
--- a/apidoc/plugins/observable.js
+++ b/apidoc/plugins/observable.js
@@ -1,5 +1,3 @@
-var util = require('util');
-
 var classes = {};
 var observables = {};