Remove stale TODO.

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index bfd17dbb8dc877da56891f1ee5c89cc1688b3ea8..6be11f412dadf12b1846711160ad597cb7fb1e86 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -1051,8 +1051,6 @@ Local<FunctionTemplate> FunctionTemplate::NewWithFastHandler(
     Isolate* isolate, FunctionCallback callback,
     experimental::FastAccessorBuilder* fast_handler, v8::Local<Value> data,
     v8::Local<Signature> signature, int length) {
-  // TODO(vogelheim): 'fast_handler' should have a more specific type than
-  // Local<Value>.
   i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
   DCHECK(!i_isolate->serializer_enabled());
   LOG_API(i_isolate, "FunctionTemplate::NewWithFastHandler");