Removed recording of Target Slot in transition arrays since they only contain maps.

src/transitions-inl.h

Index: src/transitions-inl.h
diff --git a/src/transitions-inl.h b/src/transitions-inl.h
index 24ff8c2af09e9ff23a8bb95f1234616d1aec0f3a..6716c717abdc323bb5a8b1d150af9181b1ddb539 100644
--- a/src/transitions-inl.h
+++ b/src/transitions-inl.h
@@ -144,14 +144,6 @@ Map* TransitionArray::GetTarget(int transition_number) {
 }
 
 
-Object** TransitionArray::GetTargetSlot(int transition_number) {
-  ASSERT(transition_number < number_of_transitions());
-  return HeapObject::RawField(
-      reinterpret_cast<HeapObject*>(this),
-      OffsetOfElementAt(ToTargetIndex(transition_number)));
-}
-
-
 void TransitionArray::SetTarget(int transition_number, Map* value) {
   ASSERT(transition_number < number_of_transitions());
   set(ToTargetIndex(transition_number), value);