Remove pyauto tests.

chrome/test/functional/ispy/client/dom.py

-# 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.
-
-
-def GetScriptToWaitForUnchangingDOM():
-  """Gets Javascript that waits until the DOM is stable for 5 seconds.
-
-  Times out if the DOM is not stable within 30 seconds.
-
-  Returns:
-    Javascript as a string.
-  """
-  return """
-    var target = document.body;
-    var callback = arguments[arguments.length - 1]
-
-    var timeout_id = setTimeout(function() {
-      callback()
-    }, 5000);
-
-    var observer = new MutationObserver(function(mutations) {
-      clearTimeout(timeout_id);
-      timeout_id = setTimeout(function() {
-        callback();
-      }, 5000);
-    }).observe(target, {attributes: true, childList: true,
-      characterData: true, subtree: true});
-  """