remove init blocks from all admission plugins

pkg/kubeapiserver/admission/BUILD

@@ -21,10 +21,7 @@ go_test(
 
 go_library(
     name = "go_default_library",
-    srcs = [
-        "initializer.go",
-        "registry.go",
-    ],
+    srcs = ["initializer.go"],
     tags = ["automanaged"],
     deps = [
         "//pkg/client/clientset_generated/internalclientset:go_default_library",

pkg/kubeapiserver/admission/registry.go

@@ -1,24 +0,0 @@
-/*
-Copyright 2016 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 admission
-
-import (
-	"k8s.io/apiserver/pkg/admission"
-)
-
-// Plugins is a global registry for admission plugins.
-var Plugins = admission.Plugins{}