Revert of Provide accessor for object internal properties that doesn't require debugger to be active

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index ba7eebb6a71c202531e155080e67bc7fbd6257d4..9a5353fe630eaba44fecc4d3ce558c1babd343d5 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -109,20 +109,6 @@
   return fun->IsJSFunction() ||
          (fun->IsHeapObject() &&
           HeapObject::cast(fun)->map()->has_instance_call_handler());
-}
-
-
-bool Object::IsPromise(Handle<Object> object) {
-  if (!object->IsJSObject()) return false;
-  auto js_object = Handle<JSObject>::cast(object);
-  // Promises can't have access checks.
-  if (js_object->map()->is_access_check_needed()) return false;
-  auto isolate = js_object->GetIsolate();
-  // TODO(dcarney): this should just be read from the symbol registry so as not
-  // to be context dependent.
-  auto key = isolate->promise_status();
-  // Shouldn't be possible to throw here.
-  return JSObject::HasRealNamedProperty(js_object, key).FromJust();
 }