Add RemoveWorker to make worker unavailable
Add RemoveWorker to make worker unavailable

jasonthomas/tls-observatory,mozilla/tls-observatory,mozilla/tls-observatory,mozilla/tls-observatory,jasonthomas/tls-observatory,mozmark/tls-observatory,mozilla/tls-observatory,jasonthomas/tls-observatory,jasonthomas/tls-observatory,mozmark/tls-observatory,jasonthomas/tls-observatory,mozilla/TLS-Observer,mozmark/tls-observatory,mozilla/tls-observatory