code: def remove_callback(instance, prop, callback):
      
      p = getattr(type(instance), prop)
      if not isinstance(p, CallbackProperty):
          raise TypeError("%s is not a CallbackProperty" % prop)
      p.remove_callback(instance, callback)
docs: Remove a callback function from a property in an instance
  
      Parameters
      ----------
      instance
          The instance to detach the callback from
      prop : str
          Name of callback property in `instance`
      callback : func
          The callback function to remove