Remove try/catch block that can't be hit.

core/src/main/scala/spark/deploy/worker/Worker.scala

@@ -74,16 +74,10 @@ private[spark] class Worker(
 
   def connectToMaster() {
     logInfo("Connecting to master " + masterUrl)
-    try {
-      master = context.actorFor(Master.toAkkaUrl(masterUrl))
-      master ! RegisterWorker(workerId, ip, port, cores, memory, webUiPort, publicAddress)
-      context.system.eventStream.subscribe(self, classOf[RemoteClientLifeCycleEvent])
-      context.watch(master) // Doesn't work with remote actors, but useful for testing
-    } catch {
-      case e: Exception =>
-        logError("Failed to connect to master", e)
-        System.exit(1)
-    }
+    master = context.actorFor(Master.toAkkaUrl(masterUrl))
+    master ! RegisterWorker(workerId, ip, port, cores, memory, webUiPort, publicAddress)
+    context.system.eventStream.subscribe(self, classOf[RemoteClientLifeCycleEvent])
+    context.watch(master) // Doesn't work with remote actors, but useful for testing
   }
 
   def startWebUi() {