Remove k8s.io/kubernetes dependency

internal/ingress/status/status.go

@@ -34,7 +34,6 @@ import (
 	"k8s.io/apimachinery/pkg/labels"
 	"k8s.io/apimachinery/pkg/util/wait"
 	clientset "k8s.io/client-go/kubernetes"
-	"k8s.io/kubernetes/pkg/kubelet/util/sliceutils"
 
 	"k8s.io/ingress-nginx/internal/ingress"
 	"k8s.io/ingress-nginx/internal/k8s"
@@ -208,7 +207,7 @@ func (s *statusSync) runningAddresses() ([]string, error) {
 		}
 
 		name := k8s.GetNodeIPOrName(s.Client, pod.Spec.NodeName, s.UseNodeInternalIP)
-		if !sliceutils.StringInSlice(name, addrs) {
+		if !stringInSlice(name, addrs) {
 			addrs = append(addrs, name)
 		}
 	}
@@ -365,3 +364,14 @@ func statusAddressFromService(service string, kubeClient clientset.Interface) ([
 
 	return nil, fmt.Errorf("unable to extract IP address/es from service %v", service)
 }
+
+// stringInSlice returns true if s is in list
+func stringInSlice(s string, list []string) bool {
+	for _, v := range list {
+		if v == s {
+			return true
+		}
+	}
+
+	return false
+}