remove old comment

intelligine/simulation/object/brain/AntBrain.py

     def __init__(self, context, host):
         super().__init__(context, host)
         self._movement_mode = MODE_HOME
-        self._distance_from_objective = 0  # TODO rename: distance_since_objective
+        self._distance_from_objective = 0
         self._molecule_searching = PHEROMON_DIR_EXPLO
 
     def switch_to_mode(self, mode):