Revert of [key-accumulator] Starting to reimplement the key-accumulator

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index cd5216d4fbdbdd28980f15be98cbb69401c0de32..bf0eaeda9e1914efb7ac255245cea0b698fd6cdd 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -2043,8 +2043,6 @@
   inline bool HasSlowArgumentsElements();
   inline bool HasFastStringWrapperElements();
   inline bool HasSlowStringWrapperElements();
-  bool HasEnumerableElements();
-
   inline SeededNumberDictionary* element_dictionary();  // Gets slow elements.
 
   // Requires: HasFastElements().
@@ -2295,9 +2293,6 @@
                                     PropertyFilter filter);
 
   static Handle<FixedArray> GetEnumPropertyKeys(Handle<JSObject> object);
-
-  static Handle<FixedArray> GetFastEnumPropertyKeys(Isolate* isolate,
-                                                    Handle<JSObject> object);
 
   // Returns a new map with all transitions dropped from the object's current
   // map and the ElementsKind set.