diff --git a/js/lib/when-define-shim.js b/js/lib/when-define-shim.js
deleted file mode 100644
index ad135517..00000000
--- a/js/lib/when-define-shim.js
+++ /dev/null
@@ -1,11 +0,0 @@
-if (typeof window !== "undefined") {
-    window.define = function (factory) {
-        try {
-            delete window.define;
-        } catch (e) {
-            window.define = void 0; // IE
-        }
-        window.when = factory();
-    };
-    window.define.amd = {};
-}