@Throws(IOException::class)
  internal fun removeEntry(entry: Entry): Boolean {
    // If we can't delete files that are still open, mark this entry as a zombie so its files will
    // be deleted when those files are closed.
    if (!civilizedFileSystem) {
      if (entry.lockingSourceCount > 0) {
        // Mark this entry as 'DIRTY' so that if the process crashes this entry won't be used.
        journalWriter?.let {
          it.writeUtf8(DIRTY)