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

chrome/browser/metro_utils/metro_chrome_win.cc

Index: chrome/browser/metro_utils/metro_chrome_win.cc
diff --git a/chrome/browser/metro_utils/metro_chrome_win.cc b/chrome/browser/metro_utils/metro_chrome_win.cc
index 96e84acd745373b5c2d1c29275f397d953294891..2bab9e17dd3e87dde7f16e06c6fe4f3954a1b1fb 100644
--- a/chrome/browser/metro_utils/metro_chrome_win.cc
+++ b/chrome/browser/metro_utils/metro_chrome_win.cc
@@ -62,17 +62,10 @@ bool ActivateMetroChrome() {
 }
 
 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
 }