Remove unused bits implementing parts of RFC 4880

crypto/openpgp_symmetric_encryption.h

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef CRYPTO_OPENPGP_SYMMETRIC_ENCRYPTION_H_
-#define CRYPTO_OPENPGP_SYMMETRIC_ENCRYPTION_H_
-
-#include <string>
-
-#include "base/strings/string_piece.h"
-#include "crypto/crypto_export.h"
-
-namespace crypto {
-
-// OpenPGPSymmetricEncrytion implements enough of RFC 4880 to read and write
-// uncompressed, symmetrically encrypted data. You can create ciphertext
-// compatable with this code from the command line with:
-//    gpg --compress-algo=NONE --cipher-algo=AES -c
-//
-// Likewise, the output of this can be decrypted on the command line with:
-//    gpg < input
-class CRYPTO_EXPORT OpenPGPSymmetricEncrytion {
- public:
-  enum Result {
-    OK,
-    UNKNOWN_CIPHER,  // you forgot to pass --cipher-algo=AES to gpg
-    UNKNOWN_HASH,
-    NOT_SYMMETRICALLY_ENCRYPTED,  // it's OpenPGP data, but not correct form
-    COMPRESSED,  // you forgot to pass --compress-algo=NONE
-    PARSE_ERROR,  // it's not OpenPGP data.
-    INTERNAL_ERROR,
-  };
-
-  static Result Decrypt(base::StringPiece encrypted,
-                        base::StringPiece passphrase,
-                        std::string *out);
-
-  static std::string Encrypt(base::StringPiece plaintext,
-                             base::StringPiece passphrase);
-};
-
-}  // namespace crypto
-
-#endif  // CRYPTO_OPENPGP_SYMMETRIC_ENCRYPTION_H_
-