Remove last references to NeanderObject

src/heap/heap.cc

Index: src/heap/heap.cc
diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index 1a28415e7ceba951cd9d63eb48cd6ec3caee5560..85c060e300436e6faf58884a548eed4af6fd2d18 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -2537,16 +2537,6 @@ AllocationResult Heap::AllocateTransitionArray(int capacity) {
 
 void Heap::CreateApiObjects() {
   HandleScope scope(isolate());
-  Factory* factory = isolate()->factory();
-  Handle<Map> new_neander_map =
-      factory->NewMap(JS_OBJECT_TYPE, JSObject::kHeaderSize);
-
-  // Don't use Smi-only elements optimizations for objects with the neander
-  // map. There are too many cases where element values are set directly with a
-  // bottleneck to trap the Smi-only -> fast elements transition, and there
-  // appears to be no benefit for optimize this case.
-  new_neander_map->set_elements_kind(TERMINAL_FAST_ELEMENTS_KIND);
-  set_neander_map(*new_neander_map);
   set_message_listeners(*TemplateList::New(isolate(), 2));
 }