Revert "[SPARK-27637][SHUFFLE][FOLLOW-UP] For nettyBlockTransferService, if IOException occurred while create client, check whether relative executor is alive before retry apache#24533"

This reverts commit 036fd39.

Author: HyukjinKwon

core/src/main/scala/org/apache/spark/network/netty/NettyBlockTransferService.scala

@@ -117,8 +117,8 @@ private[spark] class NettyBlockTransferService(
     try {
       val blockFetchStarter = new RetryingBlockFetcher.BlockFetchStarter {
         override def createAndStart(blockIds: Array[String], listener: BlockFetchingListener) {
+          val client = clientFactory.createClient(host, port)
           try {
-            val client = clientFactory.createClient(host, port)
             new OneForOneBlockFetcher(client, appId, execId, blockIds, listener,
               transportConf, tempFileManager).start()
           } catch {