update ref link for v1.16 (#18837)

Related to issue #18820.

remove links to prev API refs

Author: kbhawkey

content/en/docs/reference/_index.md

@@ -19,12 +19,7 @@ This section of the Kubernetes documentation contains references.
 ## API Reference
 
 * [Kubernetes API Overview](/docs/reference/using-api/api-overview/) - Overview of the API for Kubernetes.
-* Kubernetes API Versions
-  * [1.17](/docs/reference/generated/kubernetes-api/v1.17/)
-  * [1.16](/docs/reference/generated/kubernetes-api/v1.16/)
-  * [1.15](/docs/reference/generated/kubernetes-api/v1.15/)
-  * [1.14](/docs/reference/generated/kubernetes-api/v1.14/)
-  * [1.13](/docs/reference/generated/kubernetes-api/v1.13/)
+* [Kubernetes API Reference {{< latest-version >}}](/docs/reference/generated/kubernetes-api/{{< latest-version >}}/)
 
 ## API Client Libraries
 
@@ -39,18 +34,17 @@ client libraries:
 
 ## CLI Reference
 
-* [kubectl](/docs/user-guide/kubectl-overview) - Main CLI tool for running commands and managing Kubernetes clusters.
-    * [JSONPath](/docs/user-guide/jsonpath/) - Syntax guide for using [JSONPath expressions](http://goessner.net/articles/JsonPath/) with kubectl.
-* [kubeadm](/docs/admin/kubeadm/) - CLI tool to easily provision a secure Kubernetes cluster.
-* [kubefed](/docs/admin/kubefed/) - CLI tool to help you administrate your federated clusters.
+* [kubectl](/docs/reference/kubectl/overview/) - Main CLI tool for running commands and managing Kubernetes clusters.
+    * [JSONPath](/docs/reference/kubectl/jsonpath/) - Syntax guide for using [JSONPath expressions](http://goessner.net/articles/JsonPath/) with kubectl.
+* [kubeadm](/docs/reference/setup-tools/kubeadm/kubeadm/) - CLI tool to easily provision a secure Kubernetes cluster.
 
 ## Config Reference
 
-* [kubelet](/docs/admin/kubelet/) - The primary *node agent* that runs on each node. The kubelet takes a set of PodSpecs and ensures that the described containers are running and healthy.
-* [kube-apiserver](/docs/admin/kube-apiserver/) - REST API that validates and configures data for API objects such as  pods, services, replication controllers.
-* [kube-controller-manager](/docs/admin/kube-controller-manager/) - Daemon that embeds the core control loops shipped with Kubernetes.
-* [kube-proxy](/docs/admin/kube-proxy/) - Can do simple TCP/UDP stream forwarding or round-robin TCP/UDP forwarding across a set of back-ends.
-* [kube-scheduler](/docs/admin/kube-scheduler/) - Scheduler that manages availability, performance, and capacity.
+* [kubelet](/docs/reference/command-line-tools-reference/kubelet/) - The primary *node agent* that runs on each node. The kubelet takes a set of PodSpecs and ensures that the described containers are running and healthy.
+* [kube-apiserver](/docs/reference/command-line-tools-reference/kube-apiserver/) - REST API that validates and configures data for API objects such as  pods, services, replication controllers.
+* [kube-controller-manager](/docs/reference/command-line-tools-reference/kube-controller-manager/) - Daemon that embeds the core control loops shipped with Kubernetes.
+* [kube-proxy](/docs/reference/command-line-tools-reference/kube-proxy/) - Can do simple TCP/UDP stream forwarding or round-robin TCP/UDP forwarding across a set of back-ends.
+* [kube-scheduler](/docs/reference/command-line-tools-reference/kube-scheduler/) - Scheduler that manages availability, performance, and capacity.
 
 ## Design Docs