vendor cleanup: remove unused,non-go and test files

vendor/k8s.io/apimachinery/pkg/util/waitgroup/BUILD

@@ -1,31 +0,0 @@
-load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
-
-go_library(
-    name = "go_default_library",
-    srcs = [
-        "doc.go",
-        "waitgroup.go",
-    ],
-    importpath = "k8s.io/apimachinery/pkg/util/waitgroup",
-    visibility = ["//visibility:public"],
-)
-
-go_test(
-    name = "go_default_test",
-    srcs = ["waitgroup_test.go"],
-    embed = [":go_default_library"],
-)
-
-filegroup(
-    name = "package-srcs",
-    srcs = glob(["**"]),
-    tags = ["automanaged"],
-    visibility = ["//visibility:private"],
-)
-
-filegroup(
-    name = "all-srcs",
-    srcs = [":package-srcs"],
-    tags = ["automanaged"],
-    visibility = ["//visibility:public"],
-)

vendor/k8s.io/apimachinery/pkg/util/waitgroup/doc.go

@@ -1,19 +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 waitgroup implements SafeWaitGroup wrap of sync.WaitGroup.
-// Add with positive delta when waiting will fail, to prevent sync.WaitGroup race issue.
-package waitgroup // import "k8s.io/apimachinery/pkg/util/waitgroup"

vendor/k8s.io/apimachinery/pkg/util/waitgroup/waitgroup.go

@@ -1,57 +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 waitgroup
-
-import (
-	"fmt"
-	"sync"
-)
-
-// SafeWaitGroup must not be copied after first use.
-type SafeWaitGroup struct {
-	wg sync.WaitGroup
-	mu sync.RWMutex
-	// wait indicate whether Wait is called, if true,
-	// then any Add with positive delta will return error.
-	wait bool
-}
-
-// Add adds delta, which may be negative, similar to sync.WaitGroup.
-// If Add with a positive delta happens after Wait, it will return error,
-// which prevent unsafe Add.
-func (wg *SafeWaitGroup) Add(delta int) error {
-	wg.mu.RLock()
-	defer wg.mu.RUnlock()
-	if wg.wait && delta > 0 {
-		return fmt.Errorf("add with positive delta after Wait is forbidden")
-	}
-	wg.wg.Add(delta)
-	return nil
-}
-
-// Done decrements the WaitGroup counter.
-func (wg *SafeWaitGroup) Done() {
-	wg.wg.Done()
-}
-
-// Wait blocks until the WaitGroup counter is zero.
-func (wg *SafeWaitGroup) Wait() {
-	wg.mu.Lock()
-	wg.wait = true
-	wg.mu.Unlock()
-	wg.wg.Wait()
-}

vendor/k8s.io/apimachinery/pkg/util/waitgroup/waitgroup_test.go

@@ -1,60 +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 waitgroup test cases reference golang sync.WaitGroup https://golang.org/src/sync/waitgroup_test.go.
-package waitgroup
-
-import (
-	"testing"
-)
-
-func TestWaitGroup(t *testing.T) {
-	wg1 := &SafeWaitGroup{}
-	wg2 := &SafeWaitGroup{}
-	n := 16
-	wg1.Add(n)
-	wg2.Add(n)
-	exited := make(chan bool, n)
-	for i := 0; i != n; i++ {
-		go func(i int) {
-			wg1.Done()
-			wg2.Wait()
-			exited <- true
-		}(i)
-	}
-	wg1.Wait()
-	for i := 0; i != n; i++ {
-		select {
-		case <-exited:
-			t.Fatal("SafeWaitGroup released group too soon")
-		default:
-		}
-		wg2.Done()
-	}
-	for i := 0; i != n; i++ {
-		<-exited // Will block if barrier fails to unlock someone.
-	}
-}
-
-func TestWaitGroupAddFail(t *testing.T) {
-	wg := &SafeWaitGroup{}
-	wg.Add(1)
-	wg.Done()
-	wg.Wait()
-	if err := wg.Add(1); err == nil {
-		t.Errorf("Should return error when add positive after Wait")
-	}
-}