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diff --git a/thirdparty/thekla_atlas/nvmath/Basis.h b/thirdparty/thekla_atlas/nvmath/Basis.h
deleted file mode 100644
index e8146afdbe..0000000000
--- a/thirdparty/thekla_atlas/nvmath/Basis.h
+++ /dev/null
@@ -1,82 +0,0 @@
-// This code is in the public domain -- Ignacio Castaño <castano@gmail.com>
-
-#pragma once
-#ifndef NV_MATH_BASIS_H
-#define NV_MATH_BASIS_H
-
-#include "nvmath.h"
-#include "Vector.inl"
-#include "Matrix.h"
-
-namespace nv
-{
-
-    /// Basis class to compute tangent space basis, ortogonalizations and to
-    /// transform vectors from one space to another.
-    class Basis
-    {
-    public:
-
-        /// Create a null basis.
-        Basis() : tangent(0, 0, 0), bitangent(0, 0, 0), normal(0, 0, 0) {}
-
-        /// Create a basis given three vectors.
-        Basis(Vector3::Arg n, Vector3::Arg t, Vector3::Arg b) : tangent(t), bitangent(b), normal(n) {}
-
-        /// Create a basis with the given tangent vectors and the handness.
-        Basis(Vector3::Arg n, Vector3::Arg t, float sign)
-        {
-            build(n, t, sign);
-        }
-
-        NVMATH_API void normalize(float epsilon = NV_EPSILON);
-        NVMATH_API void orthonormalize(float epsilon = NV_EPSILON);
-        NVMATH_API void robustOrthonormalize(float epsilon = NV_EPSILON);
-        NVMATH_API void buildFrameForDirection(Vector3::Arg d, float angle = 0);
-
-        /// Calculate the determinant [ F G N ] to obtain the handness of the basis. 
-        float handness() const
-        {
-            return determinant() > 0.0f ? 1.0f : -1.0f;
-        }
-
-        /// Build a basis from 2 vectors and a handness flag.
-        void build(Vector3::Arg n, Vector3::Arg t, float sign)
-        {
-            normal = n;
-            tangent = t;
-            bitangent = sign * cross(t, n);
-        }
-
-        /// Compute the determinant of this basis.
-        float determinant() const
-        {
-            return 
-                tangent.x * bitangent.y * normal.z - tangent.z * bitangent.y * normal.x +
-                tangent.y * bitangent.z * normal.x - tangent.y * bitangent.x * normal.z + 
-                tangent.z * bitangent.x * normal.y - tangent.x * bitangent.z * normal.y;
-        }
-
-        bool isValid() const;
-
-        // Get transform matrix for this basis.
-        NVMATH_API Matrix matrix() const;
-
-        // Transform by this basis. (From this basis to object space).
-        NVMATH_API Vector3 transform(Vector3::Arg v) const;
-
-        // Transform by the transpose. (From object space to this basis).
-        NVMATH_API Vector3 transformT(Vector3::Arg v);
-
-        // Transform by the inverse. (From object space to this basis).
-        NVMATH_API Vector3 transformI(Vector3::Arg v) const;
-
-
-        Vector3 tangent;
-        Vector3 bitangent;
-        Vector3 normal;
-    };
-
-} // nv namespace
-
-#endif // NV_MATH_BASIS_H