Removes legacy methods
Removes legacy methods.
Proof that these methods are no longer used: https://prometheus.gprd.gitlab.net/graph?g0.range_input=1h&g0.expr=grpc_server_started_total%7Bgrpc_service%3D~%22%5Egitaly%5C%5C.(Commit%7CDiff%7CNotifications%7CRef%7CSmartHTTP%7CSSH)%22%2C%20environment%3D%22gprd%22%7D&g0.tab=1
Downstream gitaly change here: gitaly!875 (closed)
Edited by Andrew Newdigate