Avoid converting key to string for deleting of elements

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index 8e3522b54371ea3c0a4a49b434be1092c5400203..daa083f4ddb9f4b6951f986849cabaafd590f66a 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -5280,7 +5280,8 @@ MaybeHandle<Object> JSReceiver::DeleteProperty(LookupIterator* it,
 MaybeHandle<Object> JSReceiver::DeleteElement(Handle<JSReceiver> object,
                                               uint32_t index,
                                               LanguageMode language_mode) {
-  LookupIterator it(object->GetIsolate(), object, index);
+  LookupIterator it(object->GetIsolate(), object, index,
+                    LookupIterator::HIDDEN);
   return DeleteProperty(&it, language_mode);
 }