Updating the samples page to reflect the examples that have been retired.

src/site/samples/tracker/example/packages/template_binding/js/microtask.js

Index: src/site/samples/tracker/example/packages/template_binding/js/microtask.js
diff --git a/src/site/samples/tracker/example/packages/template_binding/js/microtask.js b/src/site/samples/tracker/example/packages/template_binding/js/microtask.js
deleted file mode 100644
index 827f2fe221868115734a37c6e26a58ee5883c4d8..0000000000000000000000000000000000000000
--- a/src/site/samples/tracker/example/packages/template_binding/js/microtask.js
+++ /dev/null
@@ -1,36 +0,0 @@
-/*
- * Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
- * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
- * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
- * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
- * Code distributed by Google as part of the polymer project is also
- * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
- */
-
-(function(scope) {
-
-var iterations = 0;
-var callbacks = [];
-var twiddle = document.createTextNode('');
-
-function endOfMicrotask(callback) {
-  twiddle.textContent = iterations++;
-  callbacks.push(callback);
-}
-
-function atEndOfMicrotask() {
-  while (callbacks.length) {
-    callbacks.shift()();
-  }
-}
-
-new (window.MutationObserver || JsMutationObserver)(atEndOfMicrotask)
-  .observe(twiddle, {characterData: true})
-  ;
-
-// exports
-
-scope.endOfMicrotask = endOfMicrotask;
-
-})(Platform);
-