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diff --git a/third_party/abseil_cpp/absl/random/internal/pool_urbg.h b/third_party/abseil_cpp/absl/random/internal/pool_urbg.h
deleted file mode 100644
index 05721929f5..0000000000
--- a/third_party/abseil_cpp/absl/random/internal/pool_urbg.h
+++ /dev/null
@@ -1,131 +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_POOL_URBG_H_
-#define ABSL_RANDOM_INTERNAL_POOL_URBG_H_
-
-#include <cinttypes>
-#include <limits>
-
-#include "absl/random/internal/traits.h"
-#include "absl/types/span.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-
-// RandenPool is a thread-safe random number generator [random.req.urbg] that
-// uses an underlying pool of Randen generators to generate values.  Each thread
-// has affinity to one instance of the underlying pool generators.  Concurrent
-// access is guarded by a spin-lock.
-template <typename T>
-class RandenPool {
- public:
-  using result_type = T;
-  static_assert(std::is_unsigned<result_type>::value,
-                "RandenPool template argument must be a built-in unsigned "
-                "integer type");
-
-  static constexpr result_type(min)() {
-    return (std::numeric_limits<result_type>::min)();
-  }
-
-  static constexpr result_type(max)() {
-    return (std::numeric_limits<result_type>::max)();
-  }
-
-  RandenPool() {}
-
-  // Returns a single value.
-  inline result_type operator()() { return Generate(); }
-
-  // Fill data with random values.
-  static void Fill(absl::Span<result_type> data);
-
- protected:
-  // Generate returns a single value.
-  static result_type Generate();
-};
-
-extern template class RandenPool<uint8_t>;
-extern template class RandenPool<uint16_t>;
-extern template class RandenPool<uint32_t>;
-extern template class RandenPool<uint64_t>;
-
-// PoolURBG uses an underlying pool of random generators to implement a
-// thread-compatible [random.req.urbg] interface with an internal cache of
-// values.
-template <typename T, size_t kBufferSize>
-class PoolURBG {
-  // Inheritance to access the protected static members of RandenPool.
-  using unsigned_type = typename make_unsigned_bits<T>::type;
-  using PoolType = RandenPool<unsigned_type>;
-  using SpanType = absl::Span<unsigned_type>;
-
-  static constexpr size_t kInitialBuffer = kBufferSize + 1;
-  static constexpr size_t kHalfBuffer = kBufferSize / 2;
-
- public:
-  using result_type = T;
-
-  static_assert(std::is_unsigned<result_type>::value,
-                "PoolURBG must be parameterized by an unsigned integer type");
-
-  static_assert(kBufferSize > 1,
-                "PoolURBG must be parameterized by a buffer-size > 1");
-
-  static_assert(kBufferSize <= 256,
-                "PoolURBG must be parameterized by a buffer-size <= 256");
-
-  static constexpr result_type(min)() {
-    return (std::numeric_limits<result_type>::min)();
-  }
-
-  static constexpr result_type(max)() {
-    return (std::numeric_limits<result_type>::max)();
-  }
-
-  PoolURBG() : next_(kInitialBuffer) {}
-
-  // copy-constructor does not copy cache.
-  PoolURBG(const PoolURBG&) : next_(kInitialBuffer) {}
-  const PoolURBG& operator=(const PoolURBG&) {
-    next_ = kInitialBuffer;
-    return *this;
-  }
-
-  // move-constructor does move cache.
-  PoolURBG(PoolURBG&&) = default;
-  PoolURBG& operator=(PoolURBG&&) = default;
-
-  inline result_type operator()() {
-    if (next_ >= kBufferSize) {
-      next_ = (kBufferSize > 2 && next_ > kBufferSize) ? kHalfBuffer : 0;
-      PoolType::Fill(SpanType(reinterpret_cast<unsigned_type*>(state_ + next_),
-                              kBufferSize - next_));
-    }
-    return state_[next_++];
-  }
-
- private:
-  // Buffer size.
-  size_t next_;  // index within state_
-  result_type state_[kBufferSize];
-};
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_RANDOM_INTERNAL_POOL_URBG_H_