Automatic merge from submit-queue
Remove alpha provisioning
This is the first part of https://github.com/kubernetes/features/issues/36
@kubernetes/sig-storage-misc
**Release note**:
```release-note
Alpha version of dynamic volume provisioning is removed in this release. Annotation
"volume.alpha.kubernetes.io/storage-class" does not have any special meaning. A default storage class
and DefaultStorageClass admission plugin can be used to preserve similar behavior of Kubernetes cluster,
see https://kubernetes.io/docs/user-guide/persistent-volumes/#class-1 for details.
```
...by removing the liveness/readiness probes from the cockroachdb
manifests, as explained in
github.com/kubernetes/test-infra/issues/1740#issuecomment-279555187
Shyam JVS
Kubernetes Submit Queue
Alex Robinson
Jan Safranek
Janet Kuo
Jimmy Cuadra