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diff --git a/extern/libmv/third_party/ceres/internal/ceres/block_random_access_diagonal_matrix.h b/extern/libmv/third_party/ceres/internal/ceres/block_random_access_diagonal_matrix.h
deleted file mode 100644
index ea9967817db..00000000000
--- a/extern/libmv/third_party/ceres/internal/ceres/block_random_access_diagonal_matrix.h
+++ /dev/null
@@ -1,101 +0,0 @@
-// Ceres Solver - A fast non-linear least squares minimizer
-// Copyright 2013 Google Inc. All rights reserved.
-// http://code.google.com/p/ceres-solver/
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are met:
-//
-// * Redistributions of source code must retain the above copyright notice,
-//   this list of conditions and the following disclaimer.
-// * Redistributions in binary form must reproduce the above copyright notice,
-//   this list of conditions and the following disclaimer in the documentation
-//   and/or other materials provided with the distribution.
-// * Neither the name of Google Inc. nor the names of its contributors may be
-//   used to endorse or promote products derived from this software without
-//   specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
-// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-// POSSIBILITY OF SUCH DAMAGE.
-//
-// Author: sameeragarwal@google.com (Sameer Agarwal)
-
-#ifndef CERES_INTERNAL_BLOCK_RANDOM_ACCESS_DIAGONAL_MATRIX_H_
-#define CERES_INTERNAL_BLOCK_RANDOM_ACCESS_DIAGONAL_MATRIX_H_
-
-#include <set>
-#include <vector>
-#include <utility>
-#include "ceres/mutex.h"
-#include "ceres/block_random_access_matrix.h"
-#include "ceres/collections_port.h"
-#include "ceres/triplet_sparse_matrix.h"
-#include "ceres/integral_types.h"
-#include "ceres/internal/macros.h"
-#include "ceres/internal/port.h"
-#include "ceres/internal/scoped_ptr.h"
-#include "ceres/types.h"
-
-namespace ceres {
-namespace internal {
-
-// A thread safe block diagonal matrix implementation of
-// BlockRandomAccessMatrix.
-class BlockRandomAccessDiagonalMatrix : public BlockRandomAccessMatrix {
- public:
-  // blocks is an array of block sizes.
-  explicit BlockRandomAccessDiagonalMatrix(const vector<int>& blocks);
-
-  // The destructor is not thread safe. It assumes that no one is
-  // modifying any cells when the matrix is being destroyed.
-  virtual ~BlockRandomAccessDiagonalMatrix();
-
-  // BlockRandomAccessMatrix Interface.
-  virtual CellInfo* GetCell(int row_block_id,
-                            int col_block_id,
-                            int* row,
-                            int* col,
-                            int* row_stride,
-                            int* col_stride);
-
-  // This is not a thread safe method, it assumes that no cell is
-  // locked.
-  virtual void SetZero();
-
-  // Invert the matrix assuming that each block is positive definite.
-  void Invert();
-
-  // y += S * x
-  void RightMultiply(const double* x, double* y) const;
-
-  // Since the matrix is square, num_rows() == num_cols().
-  virtual int num_rows() const { return tsm_->num_rows(); }
-  virtual int num_cols() const { return tsm_->num_cols(); }
-
-  const TripletSparseMatrix* matrix() const { return tsm_.get(); }
-  TripletSparseMatrix* mutable_matrix() { return tsm_.get(); }
-
- private:
-  // row/column block sizes.
-  const vector<int> blocks_;
-  vector<CellInfo*> layout_;
-
-  // The underlying matrix object which actually stores the cells.
-  scoped_ptr<TripletSparseMatrix> tsm_;
-
-  friend class BlockRandomAccessDiagonalMatrixTest;
-  CERES_DISALLOW_COPY_AND_ASSIGN(BlockRandomAccessDiagonalMatrix);
-};
-
-}  // namespace internal
-}  // namespace ceres
-
-#endif  // CERES_INTERNAL_BLOCK_RANDOM_ACCESS_DIAGONAL_MATRIX_H_