Removed OVS

Open vSwitch is in no way required for Kubernetes to function.  Kubernetes is not mentioned once on this project's website, nor are there any instructions for how you might use this in a k8s environment.

Author: ixodie

content/en/docs/concepts/cluster-administration/networking.md

@@ -266,12 +266,6 @@ Multus supports all [reference plugins](https://github.com/containernetworking/p
 
 The Nuage platform uses overlays to provide seamless policy-based networking between Kubernetes Pods and non-Kubernetes environments (VMs and bare metal servers). Nuage's policy abstraction model is designed with applications in mind and makes it easy to declare fine-grained policies for applications.The platform's real-time analytics engine enables visibility and security monitoring for Kubernetes applications.
 
-### OpenVSwitch
-
-[OpenVSwitch](https://www.openvswitch.org/) is a somewhat more mature but also
-complicated way to build an overlay network.  This is endorsed by several of the
-"Big Shops" for networking.
-
 ### OVN (Open Virtual Networking)
 
 OVN is an opensource network virtualization solution developed by the