Merge pull request #59172 from fisherxu/removeyear

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Remove YEAR field of all generated files and fix kubernetes boilerplate checker

**What this PR does / why we need it**:
Remove YEAR field of all generated files and fix kubernetes boilerplate checker
xref: [remove YEAR fileds in gengo #91](https://github.com/kubernetes/gengo/pull/91)

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes [#gengo/issues/24](https://github.com/kubernetes/gengo/issues/24)

**Special notes for your reviewer**:
/cc @thockin @lavalamp @sttts

**Release note**:

```release-note
NONE
```

Kubernetes-commit: e40ffd71972b820aeed283946e880aa2479f8524

vendor/k8s.io/apimachinery/pkg/util/sets/string.go

@@ -1,5 +1,5 @@
 /*
-Copyright 2017 The Kubernetes Authors.
+Copyright 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.
@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-// This file was autogenerated by set-gen. Do not edit it manually!
+// Code generated by set-gen. DO NOT EDIT.
 
 package sets
 
@@ -26,7 +26,7 @@ import (
 // sets.String is a set of strings, implemented via map[string]struct{} for minimal memory consumption.
 type String map[string]Empty
 
-// New creates a String from a list of values.
+// NewString creates a String from a list of values.
 func NewString(items ...string) String {
 	ss := String{}
 	ss.Insert(items...)