diff --git a/packages/utils/dom.js b/packages/utils/dom.js
deleted file mode 100644
index bd9b6edb5..000000000
--- a/packages/utils/dom.js
+++ /dev/null
@@ -1,11 +0,0 @@
-import Vue from 'vue';
-
-export const once = function(el, event, fn) {
-  const listener = function() {
-    if (fn) {
-      fn.apply(this, arguments);
-    }
-    el.removeEventListener(event, listener);
-  };
-  el.addEventListener(event, listener);
-};