CRI: Remove the mount name and port name.

Per discussion on https://github.com/kubernetes/kubernetes/issues/33873.

Currently the mount name is not being used and also involves some
incorrect usage (sometimes it's referencing a mount name, sometimes
it's referecing a volume name), so we decide to remove it from CRI.

The port name is also not used, so remove it as well.

pkg/kubelet/kuberuntime/kuberuntime_sandbox.go

@@ -101,7 +101,6 @@ func (m *kubeGenericRuntimeManager) generatePodSandboxConfig(pod *api.Pod, attem
 				HostPort:      &hostPort,
 				ContainerPort: &containerPort,
 				Protocol:      &protocol,
-				Name:          &port.Name,
 			})
 		}