More old files deletion.

build/config/BUILD.gn

Index: build/config/BUILD.gn
diff --git a/build/config/BUILD.gn b/build/config/BUILD.gn
index 8cbcc7bbe7db8d00ac6cba40acb9e0b3ce782111..624d1d2736a931e6a880968fb56d8207d1d2af5e 100644
--- a/build/config/BUILD.gn
+++ b/build/config/BUILD.gn
@@ -82,24 +82,9 @@ config("feature_flags") {
     # TODO(brettw) should probably be "=1".
     defines += [ "UI_COMPOSITOR_IMAGE_TRANSPORT" ]
   }
-  if (use_ash) {
-    defines += [ "USE_ASH=1" ]
-  }
-  if (use_aura) {
-    defines += [ "USE_AURA=1" ]
-  }
-  if (use_pango) {
-    defines += [ "USE_PANGO=1" ]
-  }
   if (use_cairo) {
     defines += [ "USE_CAIRO=1" ]
   }
-  if (use_clipboard_aurax11) {
-    defines += [ "USE_CLIPBOARD_AURAX11=1" ]
-  }
-  if (use_default_render_theme) {
-    defines += [ "USE_DEFAULT_RENDER_THEME=1" ]
-  }
   if (use_glib) {
     defines += [ "USE_GLIB=1" ]
   }