🧹 Deleted horizon-core-web repository on DockerHub

A while ago we have moved all old docker images on DockerHub from opennms/horizon-core-web to opennms/horizon. The container images are now published with CircleCI and I’ve deleted the opennms/horizon-core-web repository. The GitHub repositories with the manual Docker builds are archived for history but can’t be changed. You will find the Docker files in the OpenNMS source repository.