Revert v1.17 release changes on v1.16 branch (#18123)

This reverts commits:
  1131f8603e.
  cf5b8b200c.
  75de70a431.
  dff2f7b960.
  cf925bb688.
  ffd1363c0e.
  87a2cafb20.
  ffe259d6f2.

content/en/docs/tasks/network/validate-dual-stack.md

@@ -58,41 +58,6 @@ kubectl get pods pod01 -o go-template --template='{{range .status.podIPs}}{{prin
 a00:100::4
 ```
 
-You can also validate Pod IPs using the Downward API via the `status.podIPs` fieldPath. The following snippet demonstrates how you can expose the Pod IPs via an environment variable called `MY_POD_IPS` within a container.
-
-```
-        env:
-        - name: MY_POD_IPS
-          valueFrom:
-            fieldRef:
-              fieldPath: status.podIPs
-```
-
-The following command prints the value of the `MY_POD_IPS` environment variable from within a container. The value is a comma separated list that corresponds to the Pod's IPv4 and IPv6 addresses.
-```shell
-kubectl exec -it pod01 -- set | grep MY_POD_IPS
-```
-```
-MY_POD_IPS=10.244.1.4,a00:100::4
-```
-
-The Pod's IP addresses will also be written to `/etc/hosts` within a container. The following command executes a cat on `/etc/hosts` on a dual stack Pod. From the output you can verify both the IPv4 and IPv6 IP address for the Pod.
-
-```shell
-kubectl exec -it pod01 -- cat /etc/hosts
-```
-```
-# Kubernetes-managed hosts file.
-127.0.0.1    localhost
-::1    localhost ip6-localhost ip6-loopback
-fe00::0    ip6-localnet
-fe00::0    ip6-mcastprefix
-fe00::1    ip6-allnodes
-fe00::2    ip6-allrouters
-10.244.1.4    pod01
-a00:100::4    pod01
-```
-
 ## Validate Services
 
 Create the following Service without the `ipFamily` field set. When this field is not set, the Service gets an IP from the first configured range via `--service-cluster-ip-range` flag on the kube-controller-manager.
@@ -158,3 +123,4 @@ my-service   ClusterIP   fe80:20d::d06b   2001:db8:f100:4002::9d37:c0d7   80:318
 
 {{% /capture %}}
 
+