remove deprecated kubelet endpoint /metrics/resource/v1alpha1

pkg/kubelet/apis/BUILD

@@ -37,7 +37,6 @@ filegroup(
         ":package-srcs",
         "//pkg/kubelet/apis/config:all-srcs",
         "//pkg/kubelet/apis/podresources:all-srcs",
-        "//pkg/kubelet/apis/resourcemetrics/v1alpha1:all-srcs",
         "//pkg/kubelet/apis/stats/v1alpha1:all-srcs",
     ],
     tags = ["automanaged"],

pkg/kubelet/apis/resourcemetrics/v1alpha1/BUILD

@@ -1,22 +0,0 @@
-load("@io_bazel_rules_go//go:def.bzl", "go_library")
-
-go_library(
-    name = "go_default_library",
-    srcs = ["config.go"],
-    importpath = "k8s.io/kubernetes/pkg/kubelet/apis/resourcemetrics/v1alpha1",
-    visibility = ["//visibility:public"],
-)
-
-filegroup(
-    name = "package-srcs",
-    srcs = glob(["**"]),
-    tags = ["automanaged"],
-    visibility = ["//visibility:private"],
-)
-
-filegroup(
-    name = "all-srcs",
-    srcs = [":package-srcs"],
-    tags = ["automanaged"],
-    visibility = ["//visibility:public"],
-)

pkg/kubelet/apis/resourcemetrics/v1alpha1/config.go

@@ -1,23 +0,0 @@
-/*
-Copyright 2019 The Kubernetes Authors.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-package v1alpha1
-
-// TODO(RainbowMango): We don't need to maintain this package anymore.
-//  This package will be remove in release 1.20.0+. More details please refer to https://github.com/kubernetes/kubernetes/pull/86282.
-
-// Version is the string representation of the version of this configuration
-const Version = "v1alpha1"