Remove SSH Known Hosts command config

This has not been necessary for quite some time, as the SSH host key
database is managed as a ConfigMap now.

Containerfile

@@ -3,6 +3,5 @@ FROM registry.fedoraproject.org/fedora:latest
 RUN groupadd -g 1000 jenkins \
     && useradd -c 'Jenkins user' -g 1000 -l -M -s /bin/sh -u 1000 jenkins
 
-COPY known-hosts-command.ssh.conf /etc/ssh/ssh_config.d/10-known-hosts-command.conf
 
 CMD ["python3", "-c", "import signal;signal.pause()"]

known-hosts-command.ssh.conf

@@ -1 +0,0 @@
-KnownHostsCommand /usr/bin/curl -sL https://files.pyrocufflink.blue/ssh_known_hosts