async-wrap: remove before/after calls in init

It doesn't make sense to call before/after callbacks in init to the
parent because they'll be made anyway from MakeCallback. If information
does need to be propagated then it should be done automatically. Will
deal with this if the issue arrises in the future.

src/async-wrap-inl.h

@@ -30,37 +30,16 @@ inline AsyncWrap::AsyncWrap(Environment* env,
   if (!env->async_wrap_callbacks_enabled() && !parent->has_async_queue())
     return;
 
-  // TODO(trevnorris): Until it's verified all passed object's are not weak,
-  // add a HandleScope to make sure there's no leak.
   v8::HandleScope scope(env->isolate());
-
-  v8::Local<v8::Object> parent_obj;
-
   v8::TryCatch try_catch;
 
-  // If a parent value was sent then call its pre/post functions to let it know
-  // a conceptual "child" is being instantiated (e.g. that a server has
-  // received a connection).
-  if (parent != nullptr) {
-    parent_obj = parent->object();
-    env->async_hooks_pre_function()->Call(parent_obj, 0, nullptr);
-    if (try_catch.HasCaught())
-      FatalError("node::AsyncWrap::AsyncWrap", "parent pre hook threw");
-  }
-
   v8::Local<v8::Value> n = v8::Number::New(env->isolate(), provider);
   env->async_hooks_init_function()->Call(object, 1, &n);
 
   if (try_catch.HasCaught())
     FatalError("node::AsyncWrap::AsyncWrap", "init hook threw");
 
   bits_ |= 1;  // has_async_queue() is true now.
-
-  if (parent != nullptr) {
-    env->async_hooks_post_function()->Call(parent_obj, 0, nullptr);
-    if (try_catch.HasCaught())
-      FatalError("node::AsyncWrap::AsyncWrap", "parent post hook threw");
-  }
 }