Automatic merge from submit-queue

Remove redis-proxy example

The docker image is nowhere to be found, so lets remove it.
There have been a request for the Dockerfile here [1], but nobody
seems to care.


[1] https://github.com/kubernetes/kubernetes/issues/4914#issuecomment-77209779
----
**What this PR does / why we need it**:
This PR remove a k8s manifest which use a image which source is nowhere to be found.

```release-note
Remove redis-proxy.yaml sample, as the image is nowhere to be found.
```