HBASE-22294 Removed deprecated method from WALKeyImpl

Author: anis016

hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALKeyImpl.java

@@ -349,14 +349,6 @@ public TableName getTableName() {
     return tablename;
   }
 
-  /** @return log sequence number
-   * @deprecated Use {@link #getSequenceId()}
-   */
-  @Deprecated
-  public long getLogSeqNum() {
-    return getSequenceId();
-  }
-
   /**
    * Used to set original sequenceId for WALKeyImpl during WAL replay
    */