diff --git a/pkg/kubelet/kuberuntime/kuberuntime_manager.go b/pkg/kubelet/kuberuntime/kuberuntime_manager.go
index 8fc9dea78e0..159f4dce33c 100644
--- a/pkg/kubelet/kuberuntime/kuberuntime_manager.go
+++ b/pkg/kubelet/kuberuntime/kuberuntime_manager.go
@@ -894,36 +894,11 @@ func (m *kubeGenericRuntimeManager) GetPodStatus(uid kubetypes.UID, name, namesp
 	}, nil
 }
 
-// Returns the filesystem path of the pod's network namespace; if the
-// runtime does not handle namespace creation itself, or cannot return
-// the network namespace path, it returns an 'not supported' error.
-// TODO: Rename param name to sandboxID in kubecontainer.Runtime.GetNetNS().
-// TODO: Remove GetNetNS after networking is delegated to the container runtime.
-func (m *kubeGenericRuntimeManager) GetNetNS(sandboxID kubecontainer.ContainerID) (string, error) {
-	filter := &runtimeApi.PodSandboxFilter{
-		Id:            &sandboxID.ID,
-		LabelSelector: map[string]string{kubernetesManagedLabel: "true"},
-	}
-	sandboxes, err := m.runtimeService.ListPodSandbox(filter)
-	if err != nil {
-		glog.Errorf("ListPodSandbox with filter %q failed: %v", filter, err)
-		return "", err
-	}
-	if len(sandboxes) == 0 {
-		glog.Errorf("No sandbox is found with filter %q", filter)
-		return "", fmt.Errorf("Sandbox %q is not found", sandboxID)
-	}
-
-	sandboxStatus, err := m.runtimeService.PodSandboxStatus(sandboxes[0].GetId())
-	if err != nil {
-		glog.Errorf("PodSandboxStatus with id %q failed: %v", sandboxes[0].GetId(), err)
-		return "", err
-	}
-
-	if sandboxStatus.Linux != nil && sandboxStatus.Linux.Namespaces != nil {
-		return sandboxStatus.Linux.Namespaces.GetNetwork(), nil
-	}
-
+// Returns the filesystem path of the pod's network namespace.
+//
+// For CRI, container network is handled by the runtime completely and this
+// function should never be called.
+func (m *kubeGenericRuntimeManager) GetNetNS(_ kubecontainer.ContainerID) (string, error) {
 	return "", fmt.Errorf("not supported")
 }