SurfaceFlinger: Remove dead "topLevelOnly" code.

This code was obsoleted by the rework of Layer::Handle

Test: Builds
Change-Id: I4ab04ec7e28e1eed3585cc33886333b8860919cf
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index f5218b1..f98dddf 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -592,8 +592,8 @@
     void onHandleDestroyed(const sp<Layer>& layer);
 
     // remove a layer from SurfaceFlinger immediately
-    status_t removeLayer(const sp<Layer>& layer, bool topLevelOnly = false);
-    status_t removeLayerLocked(const Mutex&, const sp<Layer>& layer, bool topLevelOnly = false);
+    status_t removeLayer(const sp<Layer>& layer);
+    status_t removeLayerLocked(const Mutex&, const sp<Layer>& layer);
 
     // add a layer to SurfaceFlinger
     status_t addClientLayer(const sp<Client>& client,