Removed redundant thread code

ActorDemo.sc

@@ -77,17 +77,13 @@ object RootActor {
 
 @main
 def main() = {
-  val t = new Thread(() => {
-    implicit val rootActor =
-      ActorSystem(RootActor(), "TestActors")
+  implicit val rootActor =
+    ActorSystem(RootActor(), "TestActors")
 
-    implicit val timeout: Timeout = 3.seconds
+  implicit val timeout: Timeout = 3.seconds
+
+  rootActor ! RootActor.Begin
+  rootActor ! RootActor.GetResult
 
-    rootActor ! RootActor.Begin
-    rootActor ! RootActor.GetResult
-  })
-  t.setDaemon(true)
-  t.start()
   Thread.sleep(1000)
-  System.exit(0)
 }