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diff --git a/third-party/benchmark/src/complexity.h b/third-party/benchmark/src/complexity.h
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-// Copyright 2016 Ismael Jimenez Martinez. All rights reserved.
-//
-// 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
-//
-//     http://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.
-
-// Source project : https://github.com/ismaelJimenez/cpp.leastsq
-// Adapted to be used with google benchmark
-
-#ifndef COMPLEXITY_H_
-#define COMPLEXITY_H_
-
-#include <string>
-#include <vector>
-
-#include "benchmark/benchmark.h"
-
-namespace benchmark {
-
-// Return a vector containing the bigO and RMS information for the specified
-// list of reports. If 'reports.size() < 2' an empty vector is returned.
-std::vector<BenchmarkReporter::Run> ComputeBigO(
-    const std::vector<BenchmarkReporter::Run>& reports);
-
-// This data structure will contain the result returned by MinimalLeastSq
-//   - coef        : Estimated coeficient for the high-order term as
-//                   interpolated from data.
-//   - rms         : Normalized Root Mean Squared Error.
-//   - complexity  : Scalability form (e.g. oN, oNLogN). In case a scalability
-//                   form has been provided to MinimalLeastSq this will return
-//                   the same value. In case BigO::oAuto has been selected, this
-//                   parameter will return the best fitting curve detected.
-
-struct LeastSq {
-  LeastSq() : coef(0.0), rms(0.0), complexity(oNone) {}
-
-  double coef;
-  double rms;
-  BigO complexity;
-};
-
-// Function to return an string for the calculated complexity
-std::string GetBigOString(BigO complexity);
-
-}  // end namespace benchmark
-
-#endif  // COMPLEXITY_H_