Remove dead code from SamzaAppMasterTaskManager::startContainer()

  protected def startContainer(packagePath: Path, container: Container, env: Map[String, String], cmds: String*) {
    info("starting container %s %s %s %s" format (packagePath, container, env, cmds))
    // connect to container manager (based on similar code in the ContainerLauncher in Hadoop MapReduce)
    val contToken = container.getContainerToken
    val address = container.getNodeId.getHost + ":" + container.getNodeId.getPort