remove AgentBackground

deprecated by 7152f6ccd4f048eefa106ce9927bc609b37e4429

main.go

@@ -136,8 +136,8 @@ func startControllers() {
 		go runMessageQueue(&waitnetwork)
 	}
 
-	if !servercfg.IsAgentBackend() && !servercfg.IsRestBackend() && !servercfg.IsMessageQueueBackend() {
-		logger.Log(0, "No Server Mode selected, so nothing is being served! Set Agent mode (AGENT_BACKEND) or Rest mode (REST_BACKEND) or MessageQueue (MESSAGEQUEUE_BACKEND) to 'true'.")
+	if !servercfg.IsRestBackend() && !servercfg.IsMessageQueueBackend() {
+		logger.Log(0, "No Server Mode selected, so nothing is being served! Set Rest mode (REST_BACKEND) or MessageQueue (MESSAGEQUEUE_BACKEND) to 'true'.")
 	}
 
 	// starts the stun server