Make lint happier

Without this, golint is complaining about a few cosmetic changes.
This solves it, and is necessary if we want to add a lint test
in CI.

cmd/kured/main.go

@@ -151,10 +151,9 @@ func rebootRequired() bool {
 	if sentinelExists() {
 		log.Infof("Reboot required")
 		return true
-	} else {
-		log.Infof("Reboot not required")
-		return false
 	}
+	log.Infof("Reboot not required")
+	return false
 }
 
 func rebootBlocked(client *kubernetes.Clientset, nodeID string) bool {
@@ -334,7 +333,7 @@ func rebootAsRequired(nodeID string, window *timewindow.TimeWindow, TTL time.Dur
 
 	source := rand.NewSource(time.Now().UnixNano())
 	tick := delaytick.New(source, period)
-	for _ = range tick {
+	for range tick {
 		if window.Contains(time.Now()) && rebootRequired() && !rebootBlocked(client, nodeID) {
 			node, err := client.CoreV1().Nodes().Get(context.TODO(), nodeID, metav1.GetOptions{})
 			if err != nil {

pkg/alerts/prometheus.go

@@ -12,7 +12,7 @@ import (
 	"github.com/prometheus/common/model"
 )
 
-// Returns a list of names of active (e.g. pending or firing) alerts, filtered
+// PrometheusActiveAlerts returns a list of names of active (e.g. pending or firing) alerts, filtered
 // by the supplied regexp.
 func PrometheusActiveAlerts(prometheusURL string, filter *regexp.Regexp) ([]string, error) {
 	client, err := api.NewClient(api.Config{Address: prometheusURL})
@@ -39,7 +39,7 @@ func PrometheusActiveAlerts(prometheusURL string, filter *regexp.Regexp) ([]stri
 			}
 
 			var activeAlerts []string
-			for activeAlert, _ := range activeAlertSet {
+			for activeAlert := range activeAlertSet {
 				activeAlerts = append(activeAlerts, activeAlert)
 			}
 			sort.Sort(sort.StringSlice(activeAlerts))