Remove the non-RFC 7539 variants of ChaCha20Poly1305 crypters in QUIC

net/quic/crypto/chacha20_poly1305_encrypter_openssl.cc

-// Copyright 2014 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.
-
-#include "net/quic/crypto/chacha20_poly1305_encrypter.h"
-
-#include <openssl/evp.h>
-
-namespace net {
-
-namespace {
-
-const size_t kKeySize = 32;
-const size_t kNoncePrefixSize = 0;
-
-}  // namespace
-
-// QUIC currently uses the draft-agl-tls-chacha20poly1305-04 ChaCha20-Poly1305
-// construction rather than RFC 7539.
-ChaCha20Poly1305Encrypter::ChaCha20Poly1305Encrypter()
-    : AeadBaseEncrypter(EVP_aead_chacha20_poly1305_old(),
-                        kKeySize,
-                        kAuthTagSize,
-                        kNoncePrefixSize) {
-  static_assert(kKeySize <= kMaxKeySize, "key size too big");
-  static_assert(kNoncePrefixSize <= kMaxNoncePrefixSize,
-                "nonce prefix size too big");
-}
-
-ChaCha20Poly1305Encrypter::~ChaCha20Poly1305Encrypter() {}
-
-}  // namespace net