Removed Weave Scope link

Weave Scope is not mantained anymore. The link target is a website without valid TLS certificate and a generic hosting landing page (netlify). 


More information:
(https://github.com/weaveworks/scope

Author: eroldan

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

@@ -96,8 +96,6 @@ installation instructions. The list does not try to be exhaustive.
 
 * [Dashboard](https://github.com/kubernetes/dashboard#kubernetes-dashboard)
   is a dashboard web interface for Kubernetes.
-* [Weave Scope](https://www.weave.works/documentation/scope-latest-installing/#k8s) is a
-  tool for visualizing your containers, Pods, Services and more.
 
 ## Infrastructure