statefulset.md - Beta remnants removed

Author: consideRatio

content/en/docs/concepts/workloads/controllers/statefulset.md

@@ -45,7 +45,6 @@ provides a set of stateless replicas. Controllers such as
 ## Limitations
 
 * StatefulSet was a beta resource prior to 1.9 and not available in any Kubernetes release prior to 1.5.
-* As with all alpha/beta resources, you can disable StatefulSet through the `--runtime-config` option passed to the apiserver.
 * The storage for a given Pod must either be provisioned by a [PersistentVolume Provisioner](https://github.com/kubernetes/examples/tree/{{< param "githubbranch" >}}/staging/persistent-volume-provisioning/README.md) based on the requested `storage class`, or pre-provisioned by an admin.
 * Deleting and/or scaling a StatefulSet down will *not* delete the volumes associated with the StatefulSet. This is done to ensure data safety, which is generally more valuable than an automatic purge of all related StatefulSet resources.
 * StatefulSets currently require a [Headless Service](/docs/concepts/services-networking/service/#headless-services) to be responsible for the network identity of the Pods. You are responsible for creating this Service.