code: func (cgc *containerGC) removeSandbox(sandboxID string) {
  	klog.V(4).Infof("Removing sandbox %q", sandboxID)
  	// In normal cases, kubelet should've already called StopPodSandbox before
  	// GC kicks in. To guard against the rare cases where this is not true, try
  	// stopping the sandbox before removing it.
  	if err := cgc.client.StopPodSandbox(sandboxID); err != nil {
  		klog.Errorf("Failed to stop sandbox %q before removing: %v", sandboxID, err)
  		return
  	}
  	if err := cgc.client.RemovePodSandbox(sandboxID); err != nil {
  		klog.Errorf("Failed to remove sandbox %q: %v", sandboxID, err)
  	}
  }
docs: // removeSandbox removes the sandbox by sandboxID.