Remove unused task executor result variable

Author: ok-oldking

ok/task/TaskExecutor.py

@@ -326,7 +326,6 @@ def wait_condition(self, condition, time_out=0, pre_action=None, post_action=Non
         if time_out == 0:
             time_out = self.wait_scene_timeout
         settled = 0
-        result = None
         while not self.exit_event.is_set():
             if pre_action is not None:
                 pre_action()