Remove GardeningServer.

Tools/GardeningServer/lib/ct-scheduled-updater.html

-<!--
-Copyright 2014 The Chromium Authors. All rights reserved.
-Use of this source code is governed by a BSD-style license that can be
-found in the LICENSE file.
--->
-
-<script>
-// Schedule a repeated action with requestAnimationFrame to avoid doing work
-// when the tab is hidden.
-function CTScheduledUpdater(callback, interval) {
-  this.callback = callback;
-  this._isScheduled = false;
-  this._intervalId = setInterval(this._schedule.bind(this), interval);
-}
-
-CTScheduledUpdater.prototype._schedule = function() {
-  if (this._isScheduled)
-    return;
-
-  this._isScheduled = true;
-  requestAnimationFrame(this._do.bind(this));
-}
-
-CTScheduledUpdater.prototype._do = function() {
-  this._isScheduled = false;
-  this.callback();
-}
-</script>