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diff --git a/src/cml/mathlib/vector_angle.h b/src/cml/mathlib/vector_angle.h
deleted file mode 100644
index 910817b..0000000
--- a/src/cml/mathlib/vector_angle.h
+++ /dev/null
@@ -1,69 +0,0 @@
-/* -*- C++ -*- ------------------------------------------------------------
- 
-Copyright (c) 2007 Jesse Anders and Demian Nave http://cmldev.net/
-
-The Configurable Math Library (CML) is distributed under the terms of the
-Boost Software License, v1.0 (see cml/LICENSE for details).
-
- *-----------------------------------------------------------------------*/
-/** @file
- *  @brief
- */
-
-#ifndef vector_angle_h
-#define vector_angle_h
-
-#include <cml/mathlib/checking.h>
-
-/* Functions for finding the signed and unsigned angles between vectors in
- * 3D and 2D.
- *
- * Note that the input vectors for these functions are not required to be
- * unit length.
- *
- * @todo: Clean up promotions, conversions, and return types.
- */
-
-namespace cml {
-
-/** Signed angle between two 3D vectors. */
-template< class VecT_1, class VecT_2, class VecT_3 >
-typename detail::DotPromote<
-    typename detail::CrossPromote<VecT_1,VecT_2>::promoted_vector, VecT_3
->::promoted_scalar
-signed_angle(const VecT_1& v1, const VecT_2& v2, const VecT_3& reference)
-{
-    typedef typename detail::CrossPromote<VecT_1,VecT_2>::promoted_vector
-        vector_type;
-    typedef typename detail::DotPromote<vector_type,VecT_3>::promoted_scalar
-        value_type;
-
-    vector_type c = cross(v1,v2);
-    value_type angle = std::atan2(double(length(c)),double(dot(v1,v2)));
-    return dot(c,reference) < value_type(0) ? -angle : angle;
-}
-
-/** Unsigned angle between two 3D vectors. */
-template< class VecT_1, class VecT_2 >
-typename detail::DotPromote< VecT_1, VecT_2 >::promoted_scalar
-unsigned_angle(const VecT_1& v1, const VecT_2& v2) {
-    return std::atan2(double(length(cross(v1,v2))),double(dot(v1,v2)));
-}
-
-/** Signed angle between two 2D vectors. */
-template< class VecT_1, class VecT_2 >
-typename detail::DotPromote< VecT_1, VecT_2 >::promoted_scalar
-signed_angle_2D(const VecT_1& v1, const VecT_2& v2) {
-    return std::atan2(double(perp_dot(v1,v2)),double(dot(v1,v2)));
-}
-
-/** Unsigned angle between two 2D vectors. */
-template< class VecT_1, class VecT_2 >
-typename detail::DotPromote< VecT_1, VecT_2 >::promoted_scalar
-unsigned_angle_2D(const VecT_1& v1, const VecT_2& v2) {
-    return std::fabs(signed_angle_2D(v1,v2));
-}
-
-} // namespace cml
-
-#endif