remove broken links to examples

content/en/docs/concepts/storage/storage-classes.md

@@ -367,10 +367,6 @@ The following examples use the VMware Cloud Provider (vCP) StorageClass provisio
      for more details on how to use storage policies for persistent volumes
      management.
 
-There are few
-[vSphere examples](https://github.com/kubernetes/examples/tree/master/staging/volumes/vsphere)
-which you try out for persistent volume management inside Kubernetes for vSphere.
-
 ### Ceph RBD (deprecated) {#ceph-rbd}
 
 {{< note >}}

content/en/docs/tasks/access-application-cluster/configure-dns-cluster.md

@@ -8,6 +8,4 @@ content_type: concept
 Kubernetes offers a DNS cluster addon, which most of the supported environments enable by default. In Kubernetes version 1.11 and later, CoreDNS is recommended and is installed by default with kubeadm.
 
 <!-- body -->
-For more information on how to configure CoreDNS for a Kubernetes cluster, see the [Customizing DNS Service](/docs/tasks/administer-cluster/dns-custom-nameservers/). An example demonstrating how to use Kubernetes DNS with kube-dns, see the [Kubernetes DNS sample plugin](https://github.com/kubernetes/examples/tree/master/staging/cluster-dns).
-
-
+For more information on how to configure CoreDNS for a Kubernetes cluster, see the [Customizing DNS Service](/docs/tasks/administer-cluster/dns-custom-nameservers/).

content/en/docs/tasks/administer-cluster/dns-debugging-resolution.md

@@ -196,10 +196,6 @@ kube-dns-zxoja   IPv4          53      10.180.3.17,10.180.3.17    1h
 If you do not see the endpoints, see the endpoints section in the
 [debugging Services](/docs/tasks/debug/debug-application/debug-service/) documentation.
 
-For additional Kubernetes DNS examples, see the
-[cluster-dns examples](https://github.com/kubernetes/examples/tree/master/staging/cluster-dns)
-in the Kubernetes GitHub repository.
-
 ### Are DNS queries being received/processed?
 
 You can verify if queries are being received by CoreDNS by adding the `log` plugin to the CoreDNS configuration (aka Corefile).

content/en/docs/tutorials/stateful-application/basic-stateful-set.md

@@ -26,7 +26,6 @@ following Kubernetes concepts:
 * [Cluster DNS](/docs/concepts/services-networking/dns-pod-service/)
 * [Headless Services](/docs/concepts/services-networking/service/#headless-services)
 * [PersistentVolumes](/docs/concepts/storage/persistent-volumes/)
-* [PersistentVolume Provisioning](https://github.com/kubernetes/examples/tree/master/staging/persistent-volume-provisioning/)
 * The [kubectl](/docs/reference/kubectl/kubectl/) command line tool
 
 {{% include "task-tutorial-prereqs.md" %}}

content/en/docs/tutorials/stateful-application/zookeeper.md

@@ -27,7 +27,6 @@ Kubernetes concepts:
 - [Cluster DNS](/docs/concepts/services-networking/dns-pod-service/)
 - [Headless Services](/docs/concepts/services-networking/service/#headless-services)
 - [PersistentVolumes](/docs/concepts/storage/persistent-volumes/) 
-- [PersistentVolume Provisioning](https://github.com/kubernetes/examples/tree/master/staging/persistent-volume-provisioning/)
 - [StatefulSets](/docs/concepts/workloads/controllers/statefulset/)
 - [PodDisruptionBudgets](/docs/concepts/workloads/pods/disruptions/#pod-disruption-budget)
 - [PodAntiAffinity](/docs/concepts/scheduling-eviction/assign-pod-node/#affinity-and-anti-affinity)