Remove getters that duplicate FunctionKind in SharedFunctionInfo and ParseInfo

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index 23f7cd787362461761816af1f90f961d1931c8bf..675fb45652945be50afa529b4d7bd667491b99d4 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -3299,14 +3299,14 @@ bool Value::IsAsyncFunction() const {
   i::Handle<i::Object> obj = Utils::OpenHandle(this);
   if (!obj->IsJSFunction()) return false;
   i::Handle<i::JSFunction> func = i::Handle<i::JSFunction>::cast(obj);
-  return func->shared()->is_async();
+  return i::IsAsyncFunction(func->shared()->kind());
 }
 
 bool Value::IsGeneratorFunction() const {
   i::Handle<i::Object> obj = Utils::OpenHandle(this);
   if (!obj->IsJSFunction()) return false;
   i::Handle<i::JSFunction> func = i::Handle<i::JSFunction>::cast(obj);
-  return func->shared()->is_generator();
+  return i::IsGeneratorFunction(func->shared()->kind());
 }