[async-await] Remove call indirection in Create and Reject

src/js/promise.js

Index: src/js/promise.js
diff --git a/src/js/promise.js b/src/js/promise.js
index 0013c37911425c02d1ae881cfb6d439ce15ac6b0..6dd3268059433cd21e449335ca3c1b3e5a92a256 100644
--- a/src/js/promise.js
+++ b/src/js/promise.js
@@ -36,11 +36,6 @@ function PromiseCreate(parent) {
   return %promise_internal_constructor(parent);
 }
 
-// Only used by async-await.js
-function RejectPromise(promise, reason, debugEvent) {
-  %PromiseReject(promise, reason, debugEvent);
-}
-
 // Export to bindings
 function DoRejectPromise(promise, reason) {
   %PromiseReject(promise, reason, true);
@@ -174,9 +169,4 @@ utils.InstallFunctions(extrasUtils, 0, [
   "markPromiseAsHandled", MarkPromiseAsHandled
 ]);
 
-utils.Export(function(to) {
-  to.PromiseCreate = PromiseCreate;
-  to.RejectPromise = RejectPromise;
-});
-
 })