Addendum of HDFS-10872. Removed chan ge in MiniHadoopClusterManager.java

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/MiniHadoopClusterManager.java

@@ -150,7 +150,6 @@ public class MiniHadoopClusterManager {
    */
   public void start() throws IOException, FileNotFoundException,
       URISyntaxException {
-    conf.setBoolean("dfs.namenode.lock.detailed-metrics.enabled", true);
     if (!noDFS) {
       dfs = new MiniDFSCluster.Builder(conf).nameNodePort(nnPort)
           .numDataNodes(numDataNodes).startupOption(dfsOpts).build();