remove unused code when build garbageCollector (#128277)

* remote unused code when build garbageCollector

Change-Id: Ib0474a8da6b250315fd400fb30b6a0a8c4e8ace4

* remove unused import

---------

Co-authored-by: 孔令飞 <colin404@foxmail.com>

cmd/kube-controller-manager/app/core.go

@@ -30,7 +30,6 @@ import (
 	"k8s.io/klog/v2"
 
 	v1 "k8s.io/api/core/v1"
-	"k8s.io/apimachinery/pkg/runtime/schema"
 	genericfeatures "k8s.io/apiserver/pkg/features"
 	"k8s.io/apiserver/pkg/quota/v1/generic"
 	utilfeature "k8s.io/apiserver/pkg/util/feature"
@@ -690,11 +689,6 @@ func startGarbageCollectorController(ctx context.Context, controllerContext Cont
 		return nil, true, err
 	}
 
-	ignoredResources := make(map[schema.GroupResource]struct{})
-	for _, r := range controllerContext.ComponentConfig.GarbageCollectorController.GCIgnoredResources {
-		ignoredResources[schema.GroupResource{Group: r.Group, Resource: r.Resource}] = struct{}{}
-	}
-
 	garbageCollector, err := garbagecollector.NewComposedGarbageCollector(
 		ctx,
 		gcClientset,