Remove remainder of Athena related code from Chrome

chrome/browser/ui/athena/extensions/extension_install_ui_factory_athena.cc

Index: chrome/browser/ui/athena/extensions/extension_install_ui_factory_athena.cc
diff --git a/chrome/browser/ui/athena/extensions/extension_install_ui_factory_athena.cc b/chrome/browser/ui/athena/extensions/extension_install_ui_factory_athena.cc
deleted file mode 100644
index ec87d4f8b5d715af6485e69657a44d0a709fde61..0000000000000000000000000000000000000000
--- a/chrome/browser/ui/athena/extensions/extension_install_ui_factory_athena.cc
+++ /dev/null
@@ -1,17 +0,0 @@
-// 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.
-
-#include "chrome/browser/ui/extensions/extension_install_ui_factory.h"
-
-#include "athena/extensions/public/extensions_delegate.h"
-#include "extensions/browser/install/extension_install_ui.h"
-
-namespace extensions {
-
-scoped_ptr<ExtensionInstallUI> CreateExtensionInstallUI(
-    content::BrowserContext* context) {
-  return athena::ExtensionsDelegate::Get(context)->CreateExtensionInstallUI();
-}
-
-}  // namespace extensions