diff --git a/boot/boot.js b/boot/boot.js
index 56742c89d..acdfa0327 100644
--- a/boot/boot.js
+++ b/boot/boot.js
@@ -84,15 +84,6 @@ $tw.utils.each = function(object,callback) {
 	}
 };
 
-/*
-Pushes a value to an array only when not yet contained.
-*/
-$tw.utils.pushOnce = function(array,value) {
-	if(array.indexOf(value) == -1) {
-		array.push(value);
-	}
-}
-
 /*
 Helper for making DOM elements
 tag: tag name