Revert "Merge pull request apache#127 from derekd/yspark-581-giant-stack"

This reverts commit 396790cb5000bcf2cd5cb88e268ceeedb494800f, reversing
changes made to 55e9750bf77d4e5ef87686faeebc44ce1611f14a.

Author: Derek Dagit

core/src/main/scala/org/apache/spark/util/Utils.scala

@@ -2217,10 +2217,6 @@ private[spark] object Utils extends Logging {
         userPort(startPort, offset)
       }
       try {
-        if (tryPort > 0) {
-          // Try to bind the port to avoid a noisy Jetty warning on failure.
-          new ServerSocket(tryPort).close()
-        }
         val (service, port) = startService(tryPort)
         logInfo(s"Successfully started service$serviceString on port $port.")
         return (service, port)