Revert "Frameworks/base: Unused parameters in hwui"

This reverts commit 42ddc18d108f789705ad4eb697ce9599ad322507.

Change-Id: I3574a936a39a96314db6437d0a1eb58d260d893d
diff --git a/libs/hwui/RenderState.h b/libs/hwui/RenderState.h
index cd3d60d..cbe7cfc 100644
--- a/libs/hwui/RenderState.h
+++ b/libs/hwui/RenderState.h
@@ -52,13 +52,13 @@
 
     void debugOverdraw(bool enable, bool clear);
 
-    void registerLayer(const Layer* /* layer */) {
+    void registerLayer(const Layer* layer) {
         /*
         AutoMutex _lock(mLayerLock);
         mActiveLayers.insert(layer);
         */
     }
-    void unregisterLayer(const Layer* /* layer */) {
+    void unregisterLayer(const Layer* layer) {
         /*
         AutoMutex _lock(mLayerLock);
         mActiveLayers.erase(layer);