protected void cleanDanglingDeleteFiles() {
    if (changeMaintainer != null) {
      changeMaintainer.cleanDanglingDeleteFiles();
    }
    baseMaintainer.cleanDanglingDeleteFiles();
  }
Table maintainer for mixed-iceberg and mixed-hive tables.
amoro-ams/src/main/java/org/apache/amoro/server/optimizing/maintainer/MixedTableMaintainer.java