build: import GetPersistentVolumeClass from component-helpers

Signed-off-by: Yonatan Kahana <yonatankahana.il@gmail.com>

vendor/github.com/prometheus/procfs/schedstat.go

@@ -95,27 +95,24 @@ func (fs FS) Schedstat() (*Schedstat, error) {
 	return stats, nil
 }
 
-func parseProcSchedstat(contents string) (ProcSchedstat, error) {
-	var (
-		stats ProcSchedstat
-		err   error
-	)
+func parseProcSchedstat(contents string) (stats ProcSchedstat, err error) {
 	match := procLineRE.FindStringSubmatch(contents)
 
 	if match != nil {
 		stats.RunningNanoseconds, err = strconv.ParseUint(match[1], 10, 64)
 		if err != nil {
-			return stats, err
+			return
 		}
 
 		stats.WaitingNanoseconds, err = strconv.ParseUint(match[2], 10, 64)
 		if err != nil {
-			return stats, err
+			return
 		}
 
 		stats.RunTimeslices, err = strconv.ParseUint(match[3], 10, 64)
-		return stats, err
+		return
 	}
 
-	return stats, errors.New("could not parse schedstat")
+	err = errors.New("could not parse schedstat")
+	return
 }