agent: don't wake up main thread every hour

This patch removes an unnecessary loop that was waking up the main agent
thread every hour (not that waking up the main thread just to put it
back to sleep was likely going to be a problem, but we might as well
reduce context switching if at all possible).

Signed-off-by: Sam Whited <sam@samwhited.com>

agent/main.go

@@ -70,9 +70,7 @@ func main() {
 	agent.Start()
 	defer agent.Stop()
 
-	for {
-		time.Sleep(time.Hour)
-	}
+	select {}
 }
 
 func registerBandwidth(agent *lbagent.Agent, config Config) {