README: Drop Anchore

* This returns a 404 now. The magic of relying on cloud services.

Author: kylemanna

README.md

@@ -5,7 +5,6 @@
 [![Docker Pulls](https://img.shields.io/docker/pulls/kylemanna/openvpn.svg)](https://hub.docker.com/r/kylemanna/openvpn/)
 [![ImageLayers](https://images.microbadger.com/badges/image/kylemanna/openvpn.svg)](https://microbadger.com/#/images/kylemanna/openvpn)
 [![FOSSA Status](https://app.fossa.io/api/projects/git%2Bgithub.com%2Fkylemanna%2Fdocker-openvpn.svg?type=shield)](https://app.fossa.io/projects/git%2Bgithub.com%2Fkylemanna%2Fdocker-openvpn?ref=badge_shield)
-[![Anchore Image Overview](https://anchore.io/service/badges/image/af41b351247fc340958e9c67aed342860da328339257f809c043c865679d981d)](https://anchore.io/image/dockerhub/kylemanna%2Fopenvpn%3Alatest)
 
 
 OpenVPN server in a Docker container complete with an EasyRSA PKI CA.