diff --git a/internal/ceres/CMakeLists.txt b/internal/ceres/CMakeLists.txt
index 5ac71a9..4852ce5 100644
--- a/internal/ceres/CMakeLists.txt
+++ b/internal/ceres/CMakeLists.txt
@@ -46,7 +46,6 @@
     ${CERES_PARALLEL_FOR_SRC}
     accelerate_sparse.cc
     array_utils.cc
-    blas.cc
     block_evaluate_preparer.cc
     block_jacobi_preconditioner.cc
     block_jacobian_writer.cc
diff --git a/internal/ceres/blas.cc b/internal/ceres/blas.cc
deleted file mode 100644
index f8d006e..0000000
--- a/internal/ceres/blas.cc
+++ /dev/null
@@ -1,82 +0,0 @@
-// Ceres Solver - A fast non-linear least squares minimizer
-// Copyright 2015 Google Inc. All rights reserved.
-// http://ceres-solver.org/
-//
-// 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)
-
-#include "ceres/blas.h"
-
-#include "ceres/internal/port.h"
-#include "glog/logging.h"
-
-#ifndef CERES_NO_LAPACK
-extern "C" void dsyrk_(char* uplo,
-                       char* trans,
-                       int* n,
-                       int* k,
-                       double* alpha,
-                       double* a,
-                       int* lda,
-                       double* beta,
-                       double* c,
-                       int* ldc);
-#endif
-
-namespace ceres {
-namespace internal {
-
-void BLAS::SymmetricRankKUpdate(int num_rows,
-                                int num_cols,
-                                const double* a,
-                                bool transpose,
-                                double alpha,
-                                double beta,
-                                double* c) {
-#ifdef CERES_NO_LAPACK
-  LOG(FATAL) << "Ceres was built without a BLAS library.";
-#else
-  char uplo = 'L';
-  char trans = transpose ? 'T' : 'N';
-  int n = transpose ? num_cols : num_rows;
-  int k = transpose ? num_rows : num_cols;
-  int lda = k;
-  int ldc = n;
-  dsyrk_(&uplo,
-         &trans,
-         &n,
-         &k,
-         &alpha,
-         const_cast<double*>(a),
-         &lda,
-         &beta,
-         c,
-         &ldc);
-#endif
-}
-
-}  // namespace internal
-}  // namespace ceres
diff --git a/internal/ceres/blas.h b/internal/ceres/blas.h
deleted file mode 100644
index a43301c..0000000
--- a/internal/ceres/blas.h
+++ /dev/null
@@ -1,57 +0,0 @@
-// Ceres Solver - A fast non-linear least squares minimizer
-// Copyright 2015 Google Inc. All rights reserved.
-// http://ceres-solver.org/
-//
-// 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)
-//
-// Wrapper functions around BLAS functions.
-
-#ifndef CERES_INTERNAL_BLAS_H_
-#define CERES_INTERNAL_BLAS_H_
-
-namespace ceres {
-namespace internal {
-
-class BLAS {
- public:
-  // transpose = true  : c = alpha * a'a + beta * c;
-  // transpose = false : c = alpha * aa' + beta * c;
-  //
-  // Assumes column major matrices.
-  static void SymmetricRankKUpdate(int num_rows,
-                                   int num_cols,
-                                   const double* a,
-                                   bool transpose,
-                                   double alpha,
-                                   double beta,
-                                   double* c);
-};
-
-}  // namespace internal
-}  // namespace ceres
-
-#endif  // CERES_INTERNAL_BLAS_H_
diff --git a/internal/ceres/dense_normal_cholesky_solver.cc b/internal/ceres/dense_normal_cholesky_solver.cc
index 2d3521c..52bf1b8 100644
--- a/internal/ceres/dense_normal_cholesky_solver.cc
+++ b/internal/ceres/dense_normal_cholesky_solver.cc
@@ -30,10 +30,7 @@
 
 #include "ceres/dense_normal_cholesky_solver.h"
 
-#include <cstddef>
-
 #include "Eigen/Dense"
-#include "ceres/blas.h"
 #include "ceres/dense_sparse_matrix.h"
 #include "ceres/internal/eigen.h"
 #include "ceres/linear_solver.h"