cleanup metrics

pkg/cache/notifications.go

@@ -4,22 +4,8 @@ import (
 	"sync"
 
 	"k8s.io/klog/v2"
-
-	"github.com/prometheus/client_golang/prometheus"
-)
-
-var notificationUsage = prometheus.NewCounterVec(
-	prometheus.CounterOpts{
-		Name: "pod_identity_cache_notifications",
-		Help: "Counter of SA notifications",
-	},
-	[]string{"method"},
 )
 
-func init() {
-	prometheus.MustRegister(notificationUsage)
-}
-
 type notifications struct {
 	handlers      map[string]chan struct{}
 	mu            sync.Mutex
@@ -37,12 +23,10 @@ func (n *notifications) create(req Request) <-chan struct{} {
 	n.mu.Lock()
 	defer n.mu.Unlock()
 
-	notificationUsage.WithLabelValues("used").Inc()
 	notifier, found := n.handlers[req.CacheKey()]
 	if !found {
 		notifier = make(chan struct{})
 		n.handlers[req.CacheKey()] = notifier
-		notificationUsage.WithLabelValues("created").Inc()
 		n.fetchRequests <- &req
 	}
 	return notifier
@@ -53,7 +37,6 @@ func (n *notifications) broadcast(key string) {
 	defer n.mu.Unlock()
 	if handler, found := n.handlers[key]; found {
 		klog.V(5).Infof("Notifying handlers for %q", key)
-		notificationUsage.WithLabelValues("broadcast").Inc()
 		close(handler)
 		delete(n.handlers, key)
 	}