Kubernetes specific option is always shown in help message of `docker version`

[albers]

The --kubeconfig option of docker version is annotated as kubernetes.
Therefore it should be hidden in the help message unless the orchestrator is kubernetes.
However, it is displayed regardless of the configured orchestrator:

$ DOCKER_STACK_ORCHESTRATOR=swarm docker version --help | grep kubeconfig
      --kubeconfig string   Kubernetes config file
$ DOCKER_STACK_ORCHESTRATOR=kubernetes docker version --help | grep kubeconfig
      --kubeconfig string   Kubernetes config file
$ docker --version
Docker version 18.09.0-dev, build 21cce52b

Related: #1251
Moved here from #1251 (comment)

[bsousaa]

We removed the kubernetes integration part, hence this should no longer be an issue.

[albers]

@bsousaa I disagree, the issue is still present in current Docker versions. --kubeconfig still exists:

$ docker version --help | grep kubeconfig
      --kubeconfig string   Kubernetes config file
$ DOCKER_STACK_ORCHESTRATOR=swarm docker version --help | grep kubeconfig
      --kubeconfig string   Kubernetes config file
$ DOCKER_STACK_ORCHESTRATOR=kubernetes docker version --help | grep kubeconfig
unable to resolve docker endpoint: default orchestrator is kubernetes but unable to resolve kubernetes endpoint: stat /home/ubuntu/.kube/config: no such file or directory
ubuntu@manager1.production-blue:~$ docker --version
Docker version 20.10.22, build 3a2c30b