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/dockershim/docker_container.go

@@ -235,7 +235,6 @@ func (ds *dockerService) ContainerStatus(containerID string) (*runtimeApi.Contai
 		m := r.Mounts[i]
 		readonly := !m.RW
 		mounts = append(mounts, &runtimeApi.Mount{
-			Name:          &m.Name,
 			HostPath:      &m.Source,
 			ContainerPath: &m.Destination,
 			Readonly:      &readonly,