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

vendor/k8s.io/kubernetes/pkg/volume/util/metrics.go

@@ -1,64 +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 util
-
-import (
-	"time"
-
-	"github.com/prometheus/client_golang/prometheus"
-)
-
-var storageOperationMetric = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Name:    "storage_operation_duration_seconds",
-		Help:    "Storage operation duration",
-		Buckets: []float64{.1, .25, .5, 1, 2.5, 5, 10, 15, 25, 50},
-	},
-	[]string{"volume_plugin", "operation_name"},
-)
-
-var storageOperationErrorMetric = prometheus.NewCounterVec(
-	prometheus.CounterOpts{
-		Name: "storage_operation_errors_total",
-		Help: "Storage operation errors",
-	},
-	[]string{"volume_plugin", "operation_name"},
-)
-
-func init() {
-	registerMetrics()
-}
-
-func registerMetrics() {
-	prometheus.MustRegister(storageOperationMetric)
-	prometheus.MustRegister(storageOperationErrorMetric)
-}
-
-// OperationCompleteHook returns a hook to call when an operation is completed
-func OperationCompleteHook(plugin, operationName string) func(*error) {
-	requestTime := time.Now()
-	opComplete := func(err *error) {
-		timeTaken := time.Since(requestTime).Seconds()
-		// Create metric with operation name and plugin name
-		if *err != nil {
-			storageOperationErrorMetric.WithLabelValues(plugin, operationName).Inc()
-		} else {
-			storageOperationMetric.WithLabelValues(plugin, operationName).Observe(timeTaken)
-		}
-	}
-	return opComplete
-}