Remove duplicate entry in __all__

celery/worker/state.py

@@ -27,8 +27,7 @@ from celery.five import Counter
 
 __all__ = ['SOFTWARE_INFO', 'reserved_requests', 'active_requests',
            'total_count', 'revoked', 'task_reserved', 'maybe_shutdown',
-           'task_accepted', 'task_ready', 'task_reserved', 'task_ready',
-           'Persistent']
+           'task_accepted', 'task_reserved', 'task_ready', 'Persistent']
 
 #: Worker software/platform information.
 SOFTWARE_INFO = {'sw_ident': 'py-celery',