remove function util.IsCacheNotStarted

since controller-runtime v0.8.1, manager start all caches before other Runnables so this function is not need anymore cf kubernetes-sigs/controller-runtime#1327

Signed-off-by: Vincent Gramer <vincent@kubermatic.com>

pkg/controller/util/util.go

@@ -18,7 +18,6 @@ package util
 
 import (
 	"context"
-	"errors"
 	"fmt"
 
 	kubermaticv1 "k8c.io/kubermatic/v2/pkg/apis/kubermatic/v1"
@@ -28,7 +27,6 @@ import (
 	"k8s.io/apimachinery/pkg/types"
 	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
 	"k8s.io/client-go/util/workqueue"
-	"sigs.k8s.io/controller-runtime/pkg/cache"
 	ctrlruntimeclient "sigs.k8s.io/controller-runtime/pkg/client"
 	"sigs.k8s.io/controller-runtime/pkg/event"
 	"sigs.k8s.io/controller-runtime/pkg/handler"
@@ -186,9 +184,3 @@ func ConcurrencyLimitReached(ctx context.Context, client ctrlruntimeclient.Clien
 
 	return clustersUpdatingInProgressCount >= limit, nil
 }
-
-// IsCacheNotStarted returns true if the given error is not nil and an instance of
-// cache.ErrCacheNotStarted.
-func IsCacheNotStarted(err error) bool {
-	return errors.Is(err, &cache.ErrCacheNotStarted{})
-}