HDFS-14918. Remove useless getRedundancyThread from BlockManagerTestUtil. Contributed by Fei Hui.

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManagerTestUtil.java

@@ -34,7 +34,6 @@ import org.apache.hadoop.hdfs.server.namenode.NameNode;
 import org.apache.hadoop.hdfs.server.protocol.DatanodeStorage;
 import org.apache.hadoop.hdfs.server.protocol.StorageReport;
 import org.apache.hadoop.test.Whitebox;
-import org.apache.hadoop.util.Daemon;
 import org.junit.Assert;
 
 import com.google.common.base.Preconditions;
@@ -146,13 +145,6 @@ public class BlockManagerTestUtil {
     return domSet.size();
   }
 
-  /**
-   * @return redundancy monitor thread instance from block manager.
-   */
-  public static Daemon getRedundancyThread(final BlockManager blockManager) {
-    return blockManager.getRedundancyThread();
-  }
-
   /**
    * Stop the redundancy monitor thread.
    */