Remove utils/archive. It is not used at this point.

utils/archive/reader.h

Index: utils/archive/reader.h
diff --git a/utils/archive/reader.h b/utils/archive/reader.h
deleted file mode 100644
index ac73d6eb466d754f094b7400c503bfd8e44e380a..0000000000000000000000000000000000000000
--- a/utils/archive/reader.h
+++ /dev/null
@@ -1,83 +0,0 @@
-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-/**
- * This file declares request-handling functions for reading archives. Each
- * function is called when a message is received with the corresponding request
- * type, and posts a success or error response to the reply port.
- *
- * There is a close correspondence between functions here and the libarchive
- * API. It's left up to the Dart code to present a more Darty API. As such,
- * documentation of these functions is omitted, since it's available in the
- * libarchive documentation.
- */
-#ifndef DART_ARCHIVE_READER_H_
-#define DART_ARCHIVE_READER_H_
-
-#include "dart_archive.h"
-
-void archiveReadNew(Dart_Port p);
-
-void archiveReadSupportFilterAll(Dart_Port p, struct archive* a);
-
-void archiveReadSupportFilterBzip2(Dart_Port p, struct archive* a);
-
-void archiveReadSupportFilterCompress(Dart_Port p, struct archive* a);
-
-void archiveReadSupportFilterGzip(Dart_Port p, struct archive* a);
-
-void archiveReadSupportFilterLzma(Dart_Port p, struct archive* a);
-
-void archiveReadSupportFilterXz(Dart_Port p, struct archive* a);
-
-void archiveReadSupportFilterProgram(Dart_Port p, struct archive* a,
-                                     Dart_CObject* request);
-
-void archiveReadSupportFilterProgramSignature(
-    Dart_Port p, struct archive* a, Dart_CObject* request);
-
-void archiveReadSupportFormatAll(Dart_Port p, struct archive* a);
-
-void archiveReadSupportFormatAr(Dart_Port p, struct archive* a);
-
-void archiveReadSupportFormatCpio(Dart_Port p, struct archive* a);
-
-void archiveReadSupportFormatEmpty(Dart_Port p, struct archive* a);
-
-void archiveReadSupportFormatIso9660(Dart_Port p, struct archive* a);
-
-void archiveReadSupportFormatMtree(Dart_Port p, struct archive* a);
-
-void archiveReadSupportFormatRaw(Dart_Port p, struct archive* a);
-
-void archiveReadSupportFormatTar(Dart_Port p, struct archive* a);
-
-void archiveReadSupportFormatZip(Dart_Port p, struct archive* a);
-
-void archiveReadSetFilterOption(Dart_Port p, struct archive* a,
-                                Dart_CObject* request);
-
-void archiveReadSetFormatOption(Dart_Port p, struct archive* a,
-                                Dart_CObject* request);
-
-void archiveReadSetOption(Dart_Port p, struct archive* a,
-                          Dart_CObject* request);
-
-void archiveReadOpenFilename(Dart_Port p, struct archive* a,
-                             Dart_CObject* request);
-
-void archiveReadOpenMemory(Dart_Port p, struct archive* a,
-                           Dart_CObject* request);
-
-void archiveReadNextHeader(Dart_Port p, struct archive* a);
-
-void archiveReadDataBlock(Dart_Port p, struct archive* a);
-
-void archiveReadDataSkip(Dart_Port p, struct archive* a);
-
-void archiveReadClose(Dart_Port p, struct archive* a);
-
-void archiveReadFree(Dart_Port p, struct archive* a);
-
-#endif  // DART_ARCHIVE_READER_H_