fix devops go vet (#1928)

Signed-off-by: runzexia <runzexia@yunify.com>

vendor/k8s.io/kubectl/pkg/util/openapi/doc.go

@@ -1,21 +0,0 @@
-/*
-Copyright 2017 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 openapi is a collection of libraries for fetching the openapi spec
-// from a Kubernetes server and then indexing the type definitions.
-// The openapi spec contains the object model definitions and extensions metadata
-// such as the patchStrategy and patchMergeKey for creating patches.
-package openapi // k8s.io/kubectl/pkg/util/openapi