Remove unused layer flags.

Change-Id: Ia85365f18770a9a2c0a0e30ae56b6c2226d41be6
diff --git a/include/gui/ISurfaceComposer.h b/include/gui/ISurfaceComposer.h
index e12d163..6f4be09 100644
--- a/include/gui/ISurfaceComposer.h
+++ b/include/gui/ISurfaceComposer.h
@@ -71,9 +71,6 @@
 
     enum {
         eLayerHidden        = 0x01,
-        eLayerDither        = 0x04,
-        eLayerFilter        = 0x08,
-        eLayerBlurFreeze    = 0x10
     };
 
     enum {