How to delete an API resource in Kubernetes?

I ran:

kubectl api-resources | grep "External"
externalmetrics                                     metrics.aws                    true         ExternalMetric

I want to delete this metrics.aws API resource, but I am not even sure how it was deployed. How can I delete this safely?

• If it is a not a standard resource, then It might be implemented as a "Customer Resource Definition (crds)"

kubectl get crds | grep externalmetrics 

• Check if there are any Custom Resources created under this crd and delete them if there any :

kubectl get externalmetrics
kubectl delete externalmetrics --all 

• Then delete that CRD

kubectl delete crd externalmetrics

• Check if it is gone from api-resources list

kubectl api-resources

Update:

If you see error: the server doesn't have a resource type "v1beta1" error then run the following command to remove it:

kubectl delete apiservice v1beta1.metrics.k8s.io