Removed Apstra AOS

Apstra AOS (now owned by Juniper) has no direct integration with Kubernetes.

No CNI, no operator, no CRDs, nothing.

Kubernetes is not natively supported in the product, there is no mention of any k8s construct in the product.

This entry should be removed because it does not follow #20232

Author: ixodie

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

@@ -91,18 +91,6 @@ imply any preferential status.
 Project [Antrea](https://github.com/vmware-tanzu/antrea) is an opensource Kubernetes networking solution intended to be Kubernetes native. It leverages Open vSwitch as the networking data plane. Open vSwitch is a high-performance programmable virtual switch that supports both Linux and Windows. Open vSwitch enables Antrea to implement Kubernetes Network Policies in a high-performance and efficient manner.
 Thanks to the "programmable" characteristic of Open vSwitch, Antrea is able to implement an extensive set of networking and security features and services on top of Open vSwitch.
 
-### AOS from Apstra
-
-[AOS](https://www.apstra.com/products/aos/) is an Intent-Based Networking system that creates and manages complex datacenter environments from a simple integrated platform.  AOS leverages a highly scalable distributed design to eliminate network outages while minimizing costs.
-
-The AOS Reference Design currently supports Layer-3 connected hosts that eliminate legacy Layer-2 switching problems.  These Layer-3 hosts can be Linux servers (Debian, Ubuntu, CentOS) that create BGP neighbor relationships directly with the top of rack switches (TORs).  AOS automates the routing adjacencies and then provides fine grained control over the route health injections (RHI) that are common in a Kubernetes deployment.
-
-AOS has a rich set of REST API endpoints that enable Kubernetes to quickly change the network policy based on application requirements.  Further enhancements will integrate the AOS Graph model used for the network design with the workload provisioning, enabling an end to end management system for both private and public clouds.
-
-AOS supports the use of common vendor equipment from manufacturers including Cisco, Arista, Dell, Mellanox, HPE, and a large number of white-box systems and open network operating systems like Microsoft SONiC, Dell OPX, and Cumulus Linux.
-
-Details on how the AOS system works can be accessed here: https://www.apstra.com/products/how-it-works/
-
 ### AWS VPC CNI for Kubernetes
 
 The [AWS VPC CNI](https://github.com/aws/amazon-vpc-cni-k8s) offers integrated AWS Virtual Private Cloud (VPC) networking for Kubernetes clusters. This CNI plugin offers high throughput and availability, low latency, and minimal network jitter. Additionally, users can apply existing AWS VPC networking and security best practices for building Kubernetes clusters. This includes the ability to use VPC flow logs, VPC routing policies, and security groups for network traffic isolation.