Disable layer leak tracking

bug:17208461
Change-Id: Ibbdf3ec79c4fd19e1935a559d425d074b611e162
diff --git a/libs/hwui/RenderState.h b/libs/hwui/RenderState.h
index 74bafca..cbe7cfc 100644
--- a/libs/hwui/RenderState.h
+++ b/libs/hwui/RenderState.h
@@ -53,12 +53,16 @@
     void debugOverdraw(bool enable, bool clear);
 
     void registerLayer(const Layer* layer) {
+        /*
         AutoMutex _lock(mLayerLock);
         mActiveLayers.insert(layer);
+        */
     }
     void unregisterLayer(const Layer* layer) {
+        /*
         AutoMutex _lock(mLayerLock);
         mActiveLayers.erase(layer);
+        */
     }
 
     void registerCanvasContext(renderthread::CanvasContext* context) {