autopilot: revert passing ctx to Start methods

lnrpc/autopilotrpc/autopilot_server.go

@@ -198,14 +198,14 @@ func (s *Server) Status(ctx context.Context,
 // ModifyStatus activates the current autopilot agent, if active.
 //
 // NOTE: Part of the AutopilotServer interface.
-func (s *Server) ModifyStatus(ctx context.Context,
+func (s *Server) ModifyStatus(_ context.Context,
 	in *ModifyStatusRequest) (*ModifyStatusResponse, error) {
 
 	log.Debugf("Setting agent enabled=%v", in.Enable)
 
 	var err error
 	if in.Enable {
-		err = s.manager.StartAgent(ctx)
+		err = s.manager.StartAgent()
 	} else {
 		err = s.manager.StopAgent()
 	}