Need to delete minikube-cluster,user,context config from kubeconfig file.

[anencore94]

The exact command to reproduce the issue:

1. cat $HOME/.kube/config and check the stdout.
   (Maybe the path will be different, it depends on your KUBECONFIG enviroment variable. I guess you already know.)

2. minikube start (with or without -p option to specify profile)

3. cat $HOME/.kube/config and recheck the stdout again. And compare with output of 1).

   • you can check the information about your new minikube instance's cluster, user, context added.

4. minikube delete

5. cat $HOME/.kube/config and recheck the stdout. And compare with output of 1), 3)

   • Added information in 3) remains.
   • I think the output of 5) needs to be same as 1). Not 3)
   • I think if minikube start set kubeconfig, minikube delete should unset kubeconfig.

• I think there is this logic in the source code (func deleteContext in cmd/minikube/cmd/delete.go), but it won't actually works.

The full output of the command that failed:

NONE

The output of the minikube logs command:

NONE

The operating system version:

Ubuntu 18.04.4 LTS
minikube Version : tested with current master branch (commit: 9b7573e) binary