k8sinstallerconfigtemplates not removed after deleting the cluster via "kubectl delete" command

[haiwu]

What steps did you take and what happened:
I followed the same steps here at https://github.com/vmware-tanzu/cluster-api-provider-bringyourownhost/blob/main/docs/getting_started.md, on a vanilla Ubuntu 20.04 OS, with kind and docker on the same host.

root@instance-11:~/cluster-api-provider-bringyourownhost# k delete cluster byoh-cluster
cluster.cluster.x-k8s.io "byoh-cluster" deleted

root@instance-11:~/cluster-api-provider-bringyourownhost# k get k8sinstallerconfigtemplates
NAME AGE
byoh-cluster-control-plane 7m30s
byoh-cluster-md-0 7m30s

root@instance-11:~/cluster-api-provider-bringyourownhost# kubectl apply -f cluster.yaml
kubeadmconfigtemplate.bootstrap.cluster.x-k8s.io/byoh-cluster-md-0 created
cluster.cluster.x-k8s.io/byoh-cluster created
machinedeployment.cluster.x-k8s.io/byoh-cluster-md-0 created
kubeadmcontrolplane.controlplane.cluster.x-k8s.io/byoh-cluster-control-plane created
byocluster.infrastructure.cluster.x-k8s.io/byoh-cluster created
byomachinetemplate.infrastructure.cluster.x-k8s.io/byoh-cluster-control-plane created
byomachinetemplate.infrastructure.cluster.x-k8s.io/byoh-cluster-md-0 created
k8sinstallerconfigtemplate.infrastructure.cluster.x-k8s.io/byoh-cluster-control-plane unchanged
k8sinstallerconfigtemplate.infrastructure.cluster.x-k8s.io/byoh-cluster-md-0 unchanged

What did you expect to happen:
I would expect to see the following 2 k8sinstallerconfigtemplates would be deleted after deleting its cluster:
root@instance-11:~/cluster-api-provider-bringyourownhost# k get k8sinstallerconfigtemplates
NAME AGE
byoh-cluster-control-plane 7m30s
byoh-cluster-md-0 7m30s

What's the point of keeping them, after its cluster has already been deleted?

Anything else you would like to add:
None

Environment:

• Cluster-api-provider-bringyourownhost version:
  root@instance-11:~# clusterctl init --infrastructure byoh
  Fetching providers
  Installing cert-manager Version="v1.12.2"
  Waiting for cert-manager to be available...
  Installing Provider="cluster-api" Version="v1.4.4" TargetNamespace="capi-system"
  Installing Provider="bootstrap-kubeadm" Version="v1.4.4" TargetNamespace="capi-kubeadm-bootstrap-system"
  Installing Provider="control-plane-kubeadm" Version="v1.4.4" TargetNamespace="capi-kubeadm-control-plane-system"
  Installing Provider="infrastructure-byoh" Version="v0.4.0" TargetNamespace="byoh-system"

• Kubernetes version: (use kubectl version --short): v1.25.11

• OS (e.g. from /etc/os-release): 20.04.6 LTS (Focal Fossa)

[LuisPedroso]

i'm having the same problem, and when i apply yaml again, it doesn't do the kubeadm init