diff --git a/ext/src/lib/utils.js b/ext/src/lib/utils.js
deleted file mode 100644
index 4549b9f..0000000
--- a/ext/src/lib/utils.js
+++ /dev/null
@@ -1,11 +0,0 @@
-"use strict";
-
-export function cloneIntoWithProto (obj, destination) {
-	const ret = cloneInto(obj, destination);
-
-	for (const key of Object.getOwnPropertyNames(obj.__proto__)) {
-	    exportFunction(obj.__proto__[key].bind(obj), ret, { defineAs: key });
-	}
-
-	return ret;
-}