code: def drop_sampling_strategy(self, sensor_name):
          
          cache_key = self._get_strategy_cache_key(sensor_name)
          self._strategy_cache.pop(cache_key, None)
docs: Drop the sampling strategy for the named sensor from the cache
  
          Calling :meth:`set_sampling_strategy` requires the sensor manager to
          memorise the requested strategy so that it can automatically be reapplied.
          If the client is no longer interested in the sensor, or knows the sensor
          may be removed from the server, then it can use this method to ensure the
          manager forgets about the strategy.  This method will not change the current
          strategy.  No error is raised if there is no strategy to drop.
  
          Parameters
          ----------
  
          sensor_name : str
              Name of the sensor (normal or escaped form)