remove triggers

Author: VoronovaIntern

demos/action_recognition_demo/python/action_recognition_demo/pipeline.py

@@ -57,7 +57,7 @@ def start(self):
 
     def join(self):
         self.input_queue.put(Signal.STOP)
-        if(self._thread is not None):
+        if self._thread is not None:
             self._thread.join()
         self._thread = None
         self.working = False