Remove GardeningServer.

Tools/GardeningServer/model/tree-status.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.
--->
-
-<link rel="import" href="../lib/net.html">
-
-<script>
-function TreeStatus(project) {
-  this.project = project;
-  this.message = '';
-  this.status = 'unknown';
-
-  this.url = "https://{1}-status.appspot.com/".assign(project);
-}
-
-TreeStatus.prototype.update = function() {
-  var url = this.url + 'current?format=json';
-  return net.json(url).then(function(response) {
-    this.updateStatus(response);
-  }.bind(this));
-};
-
-TreeStatus.prototype.updateStatus = function(status) {
-  if (status.can_commit_freely) {
-    this.message = null;
-    this.status = 'open';
-    return;
-  }
-
-  this.message = status.message + ' by ' + status.username;
-  var responseLowerCase = status.message.toLowerCase();
-  if (responseLowerCase.indexOf('throttled') != -1) {
-    this.status = 'throttled';
-  } else if (responseLowerCase.indexOf("closed") != -1) {
-    this.status = 'closed';
-  } else {
-    this.status = 'unknown';
-  }
-};
-</script>