chore(3p/abseil_cpp): unvendor abseil_cpp r/3786

we weren't actually using these sources anymore, okay?

Change-Id: If701571d9716de308d3512e1eb22c35db0877a66
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5248
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
Autosubmit: tazjin <tazjin@tvl.su>

1 files changed, 0 insertions, 88 deletions

diff --git a/third_party/abseil_cpp/absl/random/internal/randen_traits.h b/third_party/abseil_cpp/absl/random/internal/randen_traits.h
deleted file mode 100644
index 53caa936140a..000000000000
--- a/third_party/abseil_cpp/absl/random/internal/randen_traits.h
+++ /dev/null
@@ -1,88 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_RANDOM_INTERNAL_RANDEN_TRAITS_H_
-#define ABSL_RANDOM_INTERNAL_RANDEN_TRAITS_H_
-
-// HERMETIC NOTE: The randen_hwaes target must not introduce duplicate
-// symbols from arbitrary system and other headers, since it may be built
-// with different flags from other targets, using different levels of
-// optimization, potentially introducing ODR violations.
-
-#include <cstddef>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// RANDen = RANDom generator or beetroots in Swiss German.
-// 'Strong' (well-distributed, unpredictable, backtracking-resistant) random
-// generator, faster in some benchmarks than std::mt19937_64 and pcg64_c32.
-//
-// High-level summary:
-// 1) Reverie (see "A Robust and Sponge-Like PRNG with Improved Efficiency") is
-//    a sponge-like random generator that requires a cryptographic permutation.
-//    It improves upon "Provably Robust Sponge-Based PRNGs and KDFs" by
-//    achieving backtracking resistance with only one Permute() per buffer.
-//
-// 2) "Simpira v2: A Family of Efficient Permutations Using the AES Round
-//    Function" constructs up to 1024-bit permutations using an improved
-//    Generalized Feistel network with 2-round AES-128 functions. This Feistel
-//    block shuffle achieves diffusion faster and is less vulnerable to
-//    sliced-biclique attacks than the Type-2 cyclic shuffle.
-//
-// 3) "Improving the Generalized Feistel" and "New criterion for diffusion
-//    property" extends the same kind of improved Feistel block shuffle to 16
-//    branches, which enables a 2048-bit permutation.
-//
-// Combine these three ideas and also change Simpira's subround keys from
-// structured/low-entropy counters to digits of Pi (or other random source).
-
-// RandenTraits contains the basic algorithm traits, such as the size of the
-// state, seed, sponge, etc.
-struct RandenTraits {
-  // Size of the entire sponge / state for the randen PRNG.
-  static constexpr size_t kStateBytes = 256;  // 2048-bit
-
-  // Size of the 'inner' (inaccessible) part of the sponge. Larger values would
-  // require more frequent calls to RandenGenerate.
-  static constexpr size_t kCapacityBytes = 16;  // 128-bit
-
-  // Size of the default seed consumed by the sponge.
-  static constexpr size_t kSeedBytes = kStateBytes - kCapacityBytes;
-
-  // Assuming 128-bit blocks, the number of blocks in the state.
-  // Largest size for which security proofs are known.
-  static constexpr size_t kFeistelBlocks = 16;
-
-  // Ensures SPRP security and two full subblock diffusions.
-  // Must be > 4 * log2(kFeistelBlocks).
-  static constexpr size_t kFeistelRounds = 16 + 1;
-
-  // Size of the key. A 128-bit key block is used for every-other
-  // feistel block (Type-2 generalized Feistel network) in each round.
-  static constexpr size_t kKeyBytes = 16 * kFeistelRounds * kFeistelBlocks / 2;
-};
-
-// Randen key arrays. In randen_round_keys.cc
-extern const unsigned char kRandenRoundKeys[RandenTraits::kKeyBytes];
-extern const unsigned char kRandenRoundKeysBE[RandenTraits::kKeyBytes];
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_RANDEN_TRAITS_H_