code: func (c *Calcium) RemoveNode(ctx context.Context, nodename, podname string) (*types.Pod, error) {
  	n, err := c.GetNode(ctx, podname, nodename)
  	if err != nil {
  		return nil, err
  	}
  	c.store.DeleteNode(ctx, n)
  	return c.store.GetPod(ctx, podname)
  }
docs: // RemoveNode remove a node