Remove support for page_action.icons, and the legacy code surrounding it.

chrome/test/data/extensions/api_test/page_action/old_api/set_icon_index.js

Index: chrome/test/data/extensions/api_test/page_action/old_api/set_icon_index.js
diff --git a/chrome/test/data/extensions/api_test/page_action/old_api/set_icon_index.js b/chrome/test/data/extensions/api_test/page_action/old_api/set_icon_index.js
deleted file mode 100644
index 01e0a25df7a97b3d12661279cab028e8dfb65e35..0000000000000000000000000000000000000000
--- a/chrome/test/data/extensions/api_test/page_action/old_api/set_icon_index.js
+++ /dev/null
@@ -1,10 +0,0 @@
-// Copyright (c) 2011 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.
-
-// Enable the page action on this tab.
-chrome.tabs.getSelected(null, function(tab) {
-  chrome.pageAction.setIcon({tabId: tab.id, iconIndex: 1}, function(){
-    chrome.test.notifyPass();
-  });
-});