HDFS-12397. Ozone: KSM: multiple delete methods in KSMMetadataManager. Contributed by Nandakumar.

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/ksm/KSMMetadataManager.java

@@ -124,13 +124,6 @@ public interface KSMMetadataManager {
    */
   byte[] getDeletedKeyName(byte[] keyName);
 
-  /**
-   * Deletes the key from DB.
-   *
-   * @param key - key name
-   */
-  void deleteKey(byte[] key) throws IOException;
-
   /**
    * Given a volume, check if it is empty,
    * i.e there are no buckets inside it.

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/ksm/KSMMetadataManagerImpl.java

@@ -166,16 +166,6 @@ public byte[] getDeletedKeyName(byte[] keyName) {
         DELETING_KEY_PREFIX + DFSUtil.bytes2String(keyName));
   }
 
-  /**
-   * Deletes the key on Metadata DB.
-   *
-   * @param key - key name
-   */
-  @Override
-  public void deleteKey(byte[] key) throws IOException {
-    store.delete(key);
-  }
-
   /**
    * Returns the read lock used on Metadata DB.
    * @return readLock