win/aura: Remove some more non-aura code for Windows.

chrome/browser/metro_utils/metro_chrome_win.cc

 // Copyright 2013 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/metro_utils/metro_chrome_win.h"
 
 #include <windows.h>
 #include <shobjidl.h>
 
 #include "base/files/file_path.h"
@@ skipping 44 matching lines @@
   if (FAILED(hr)) {
     NOTREACHED() << "Failed to activate metro chrome. Error: "
                  << std::showbase << std::hex << hr;
     return false;
   }
 
   return true;
 }
 
 Win8Environment GetWin8Environment(HostDesktopType desktop) {
-#if defined(USE_AURA) && defined(USE_ASH)
   if (desktop == chrome::HOST_DESKTOP_TYPE_ASH)
     return WIN_8_ENVIRONMENT_METRO_AURA;
   else
     return WIN_8_ENVIRONMENT_DESKTOP_AURA;
-#else
-  if (base::win::IsProcessImmersive(::GetCurrentProcess()))
-    return WIN_8_ENVIRONMENT_METRO;
-  else
-    return WIN_8_ENVIRONMENT_DESKTOP;
-#endif
 }
 
 
 }  // namespace chrome