Eliminate redundant descriptor ElementTransitionAndStoreDescriptor.

src/interface-descriptors.cc

Index: src/interface-descriptors.cc
diff --git a/src/interface-descriptors.cc b/src/interface-descriptors.cc
index 3f53b1fbbb62da8603831737528dec84e4f3b43c..c8daa5dc22f59c8f2b167f639d6f9b9b0e57a7e9 100644
--- a/src/interface-descriptors.cc
+++ b/src/interface-descriptors.cc
@@ -148,14 +148,6 @@ void StoreGlobalViaContextDescriptor::InitializePlatformSpecific(
 }
 
 
-void ElementTransitionAndStoreDescriptor::InitializePlatformSpecific(
-    CallInterfaceDescriptorData* data) {
-  Register registers[] = {ValueRegister(), MapRegister(), NameRegister(),
-                          ReceiverRegister()};
-  data->InitializePlatformSpecific(arraysize(registers), registers);
-}
-
-
 void InstanceofDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {left(), right()};