diff --git a/Triangulation_on_sphere_2/include/CGAL/Delaunay_triangulation_on_sphere_2.h b/Triangulation_on_sphere_2/include/CGAL/Delaunay_triangulation_on_sphere_2.h
index 24695ead128..564a39e0fc0 100644
--- a/Triangulation_on_sphere_2/include/CGAL/Delaunay_triangulation_on_sphere_2.h
+++ b/Triangulation_on_sphere_2/include/CGAL/Delaunay_triangulation_on_sphere_2.h
@@ -278,102 +278,6 @@ public:
   bool is_valid(bool verbose = false, int level = 0) const;
   bool is_valid_face(Face_handle fh, bool verbose = false, int level = 0) const;
   bool is_valid_vertex(Vertex_handle fh, bool verbose = false, int level = 0) const;
-
-  template <typename Stream>
-  Stream& write_vertices(Stream& out, std::vector<Vertex_handle>& t)
-  {
-    for(typename std::vector<Vertex_handle>::iterator it=t.begin(); it!=t.end(); ++it)
-    {
-      if((*it)->face() == Face_handle())
-      {
-        const Point& p = point(*it);
-        out << p.x() << " " << p.y() << " " << p.z() << std::endl;
-      }
-    }
-
-    return out;
-  }
-
-  // @todo move this stuff to helper
-  template <typename Stream>
-  Stream& write_triangulation_to_off(Stream& out, Stream& out2)
-  {
-    // Points of triangulation
-    for(All_faces_iterator it=tds().face_iterator_base_begin(); it!=all_faces_end(); ++it)
-    {
-      if(!it->is_ghost())
-        write_face_to_off(out, it);
-      else
-        write_face_to_off(out2, it);
-    }
-
-    return out;
-  }
-
-  template <typename Stream>
-  Stream& write_triangulation_to_off(Stream& out)
-  {
-    std::vector<Face_handle> faces;
-
-    // Points of triangulation
-    for(All_faces_iterator it=all_faces_begin(); it!=all_faces_end(); ++it)
-    {
-      for(int i=0; i<3; ++i)
-      {
-        const Point& p = point(it, i);
-        out << p.x() << " " << p.y() << " " << p.z() << std::endl;
-      }
-    }
-
-    return out;
-  }
-
-  template <typename Stream >
-  Stream& write_face_to_off(Stream& out, Face_handle f)
-  {
-    for(int i=0; i<3; ++i)
-    {
-      const Point& p = point(f, i);
-      out << p.x() << " " << p.y() << " " << p.z() << std::endl;
-    }
-
-    return out;
-  }
-
-  template <typename Stream, typename FaceIt>
-  Stream& write_faces_to_off(Stream& out, FaceIt face_begin, FaceIt face_end)
-  {
-    FaceIt fit = face_begin;
-    for(; fit!=face_end; ++fit)
-    {
-      for(int i=0; i<3; ++i)
-      {
-        const Point& p = point(*fit, i);
-        out << p.x() << " " << p.y() << " " << p.z() << std::endl;
-      }
-    }
-
-    return out;
-  }
-
-  template <typename Stream, typename FaceIt>
-  Stream& write_edges_to_off(Stream& out, FaceIt face_begin, FaceIt face_end)
-  {
-    FaceIt fit=face_begin;
-    for(; fit!=face_end; ++fit)
-    {
-      Face_handle f = (*fit).first;
-      int i = (*fit).second;
-
-      const Point& p = point(f->vertex(cw(i)));
-      const Point& q = point(f->vertex(ccw(i)));
-
-      out << p.x() << " " << p.y() << " " << p.z() << std::endl;
-      out << q.x() << " " << q.y() << " " << q.z() << std::endl;
-    }
-
-    return out;
-  }
 };
 
 // ------------------------ PREDICATES / CONSTRUCTIONS --------------------------------//