Start removing the unused apiserver code

pkg/kubernetes/apiserver/options/globalflags.go

pkg/kubernetes/apiserver/options/globalflags_providerless.go

pkg/kubernetes/apiserver/options/globalflags_providers.go

pkg/kubernetes/apiserver/options/globalflags_test.go

pkg/kubernetes/apiserver/options/options.go

pkg/kubernetes/apiserver/options/options_test.go

pkg/kubernetes/apiserver/options/validation_test.go

pkg/kubernetes/apiserver/server.go

pkg/kubernetes/apiserver/server_test.go

...s.default.svc-kubernetes.default-kubernetes-localhost.crt

...s.default.svc-kubernetes.default-kubernetes-localhost.key

pkg/kubernetes/apiserver/testing/testdata/README.md

pkg/kubernetes/apiserver/testing/testserver.go