HDFS-13151. Fix the javadoc error in ReplicaInfo

Signed-off-by: Akira Ajisaka <aajisaka@apache.org>

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/ReplicaInfo.java

@@ -53,7 +53,6 @@ abstract public class ReplicaInfo extends Block
    * Constructor.
    * @param block a block
    * @param vol volume where replica is located
-   * @param dir directory path where block and meta files are located
    */
   ReplicaInfo(Block block, FsVolumeSpi vol) {
     this(vol, block.getBlockId(), block.getNumBytes(),