kubeadm: remove the "alpha kubelet config enable-dynamic" command

The command was deprecated in 1.19 and can be removed in 1.20.

Author: neolit123

cmd/kubeadm/app/cmd/alpha/BUILD

@@ -6,7 +6,6 @@ go_library(
         "alpha.go",
         "certs.go",
         "kubeconfig.go",
-        "kubelet.go",
         "selfhosting.go",
     ],
     importpath = "k8s.io/kubernetes/cmd/kubeadm/app/cmd/alpha",
@@ -25,13 +24,11 @@ go_library(
         "//cmd/kubeadm/app/phases/certs/renewal:go_default_library",
         "//cmd/kubeadm/app/phases/copycerts:go_default_library",
         "//cmd/kubeadm/app/phases/kubeconfig:go_default_library",
-        "//cmd/kubeadm/app/phases/kubelet:go_default_library",
         "//cmd/kubeadm/app/phases/selfhosting:go_default_library",
         "//cmd/kubeadm/app/util/apiclient:go_default_library",
         "//cmd/kubeadm/app/util/config:go_default_library",
         "//cmd/kubeadm/app/util/kubeconfig:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/util/duration:go_default_library",
-        "//staging/src/k8s.io/apimachinery/pkg/util/version:go_default_library",
         "//vendor/github.com/lithammer/dedent:go_default_library",
         "//vendor/github.com/pkg/errors:go_default_library",
         "//vendor/github.com/spf13/cobra:go_default_library",

cmd/kubeadm/app/cmd/alpha/alpha.go

@@ -31,7 +31,6 @@ func NewCmdAlpha(in io.Reader, out io.Writer) *cobra.Command {
 	}
 
 	cmd.AddCommand(newCmdCertsUtility(out))
-	cmd.AddCommand(newCmdKubeletUtility())
 	cmd.AddCommand(newCmdKubeConfigUtility(out))
 	cmd.AddCommand(NewCmdSelfhosting(in))
 

cmd/kubeadm/app/cmd/alpha/kubelet.go

@@ -4,7 +4,6 @@ go_library(
     name = "go_default_library",
     srcs = [
         "config.go",
-        "dynamic.go",
         "flags.go",
         "kubelet.go",
     ],
@@ -32,7 +31,6 @@ go_test(
     name = "go_default_test",
     srcs = [
         "config_test.go",
-        "dynamic_test.go",
         "flags_test.go",
     ],
     embed = [":go_default_library"],