static byte[] userPermissionRowKey(Permission permission) {
    byte[] row;
    if (permission instanceof TablePermission) {
      TablePermission tablePerm = (TablePermission) permission;
      row = tablePerm.getTableName().getName();
    } else if (permission instanceof NamespacePermission) {
      NamespacePermission nsPerm = (NamespacePermission) permission;
      row = Bytes.toBytes(toNamespaceEntry(nsPerm.getNamespace()));
    } else {
      // permission instanceof TablePermission
      row = ACL_GLOBAL_NAME;
    }
    return row;
  }
Remove specified table column from the acl table.
hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/PermissionStorage.java