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diff --git a/extern/libmv/third_party/ceres/internal/ceres/block_sparse_matrix.h b/extern/libmv/third_party/ceres/internal/ceres/block_sparse_matrix.h
deleted file mode 100644
index e17d12a706e..00000000000
--- a/extern/libmv/third_party/ceres/internal/ceres/block_sparse_matrix.h
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-// Ceres Solver - A fast non-linear least squares minimizer
-// Copyright 2010, 2011, 2012 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)
-//
-// Implementation of the SparseMatrix interface for block sparse
-// matrices.
-
-#ifndef CERES_INTERNAL_BLOCK_SPARSE_MATRIX_H_
-#define CERES_INTERNAL_BLOCK_SPARSE_MATRIX_H_
-
-#include "ceres/block_structure.h"
-#include "ceres/sparse_matrix.h"
-#include "ceres/internal/eigen.h"
-#include "ceres/internal/macros.h"
-#include "ceres/internal/scoped_ptr.h"
-
-namespace ceres {
-namespace internal {
-
-class TripletSparseMatrix;
-
-// This class implements the SparseMatrix interface for storing and
-// manipulating block sparse matrices. The block structure is stored
-// in the CompressedRowBlockStructure object and one is needed to
-// initialize the matrix. For details on how the blocks structure of
-// the matrix is stored please see the documentation
-//
-//   internal/ceres/block_structure.h
-//
-class BlockSparseMatrix : public SparseMatrix {
- public:
-  // Construct a block sparse matrix with a fully initialized
-  // CompressedRowBlockStructure objected. The matrix takes over
-  // ownership of this object and destroys it upon destruction.
-  //
-  // TODO(sameeragarwal): Add a function which will validate legal
-  // CompressedRowBlockStructure objects.
-  explicit BlockSparseMatrix(CompressedRowBlockStructure* block_structure);
-
-  BlockSparseMatrix();
-  virtual ~BlockSparseMatrix();
-
-  // Implementation of SparseMatrix interface.
-  virtual void SetZero();
-  virtual void RightMultiply(const double* x, double* y) const;
-  virtual void LeftMultiply(const double* x, double* y) const;
-  virtual void SquaredColumnNorm(double* x) const;
-  virtual void ScaleColumns(const double* scale);
-  virtual void ToDenseMatrix(Matrix* dense_matrix) const;
-  virtual void ToTextFile(FILE* file) const;
-
-  virtual int num_rows()         const { return num_rows_;     }
-  virtual int num_cols()         const { return num_cols_;     }
-  virtual int num_nonzeros()     const { return num_nonzeros_; }
-  virtual const double* values() const { return values_.get(); }
-  virtual double* mutable_values()     { return values_.get(); }
-
-  void ToTripletSparseMatrix(TripletSparseMatrix* matrix) const;
-  const CompressedRowBlockStructure* block_structure() const;
-
- private:
-  int num_rows_;
-  int num_cols_;
-  int max_num_nonzeros_;
-  int num_nonzeros_;
-  scoped_array<double> values_;
-  scoped_ptr<CompressedRowBlockStructure> block_structure_;
-  CERES_DISALLOW_COPY_AND_ASSIGN(BlockSparseMatrix);
-};
-
-}  // namespace internal
-}  // namespace ceres
-
-#endif  // CERES_INTERNAL_BLOCK_SPARSE_MATRIX_H_