code: func (r *ControllerExpectations) DeleteExpectations(controllerKey string) {
  	if exp, exists, err := r.GetByKey(controllerKey); err == nil && exists {
  		if err := r.Delete(exp); err != nil {
  			klog.V(2).Infof("Error deleting expectations for controller %v: %v", controllerKey, err)
  		}
  	}
  }
docs: // DeleteExpectations deletes the expectations of the given controller from the TTLStore.