Fix build error

Fix build error caused by #62

Author: arlakshm

sonic-chassisd/scripts/chassisd

@@ -688,8 +688,6 @@ class ChassisdDaemon(daemon_base.DaemonBase):
 
             self.log_info("Stop daemon main loop")
 
-            if config_manager is not None:
-                config_manager.task_stop()
         finally:
             # If we don't cleanup the config_manager process the chassisd process
             # won't die when an exception occurs.