MiqProxy#post_my_logs is not used.

The only possible caller is LogFile._request_logs via LogFile.logs_from_server.

We only call LogFile.logs_from_server from MiqServer#synchronize_logs which is only called in the context of a single server/appliance, never a MiqProxy object.

The MiqProxy posts it's logs via the AgentController#log:
https://github.com/ManageIQ/manageiq/blob/fbf459715b3ff4dcec89ad2674ffaa5eacc5fe2e/vmdb/app/controllers/agent_controller.rb#L44

The rest of the logging in the MiqProxy will need to be deleted along with the AgentController, and the various routes and UI code calling these methods.