Revert of [proxies] Implement [[Enumerate]] and [[OwnPropertyKeys]]

src/key-accumulator.h

Index: src/key-accumulator.h
diff --git a/src/key-accumulator.h b/src/key-accumulator.h
index 47a1a6486bf200b2df8f7f74c6f71dd26a456219..8f9cc7c139bca53a5585fd4490eac78ce1d65eb6 100644
--- a/src/key-accumulator.h
+++ b/src/key-accumulator.h
@@ -44,7 +44,6 @@
   void AddKeys(Handle<JSObject> array,
                AddKeyConversion convert = DO_NOT_CONVERT);
   void AddKeysFromProxy(Handle<JSObject> array);
-  void AddKeysFromProxy(Handle<FixedArray> keys);
   void AddElementKeysFromInterceptor(Handle<JSObject> array);
   // Jump to the next level, pushing the current |levelLength_| to
   // |levelLengths_| and adding a new list to |elements_|.