remove a few dangling asbytes from rebase

IPython/parallel/controller/hub.py

@@ -923,7 +923,7 b' class Hub(SessionFactory):'
                 content=content,
                 ident=reg)
 
-        heart = util.asbytes(uuid)
+        heart = cast_bytes(uuid)
 
         if content['status'] == 'ok':
             if heart in self.heartmonitor.hearts:

IPython/parallel/controller/scheduler.py

@@ -261,7 +261,7 b' class TaskScheduler(SessionFactory):'
         
         content = msg['content']
         for uuid in content.get('engines', {}).values():
-            self._register_engine(asbytes(uuid))
+            self._register_engine(cast_bytes(uuid))
 
     
     @util.log_errors