Preparations for some async changes

jedi/evaluate/syntax_tree.py

@@ -99,10 +99,7 @@ def eval_node(context, element):
             context_set = eval_trailer(context, context_set, trailer)
 
         if had_await:
-            await_context_set = context_set.py__getattribute__(u"__await__")
-            if not await_context_set:
-                debug.warning('Tried to run py__await__ on context %s', context)
-            return await_context_set.execute_evaluated().py__stop_iteration_returns()
+            return context_set.py__await__().py__stop_iteration_returns()
         return context_set
     elif typ in ('testlist_star_expr', 'testlist',):
         # The implicit tuple in statements.