Fix Kernel_d

Convex_hull_d/include/CGAL/Delaunay_d.h

@@ -228,7 +228,6 @@ public:
       }
     }
 
-    Simplex_iterator(const Simplex_iterator& it) : Base_iterator(it) {}
 
     Simplex_iterator& operator++()
     /* here we get a new candidate from the stack

Kernel_d/include/CGAL/Kernel_d/Direction_d.h

@@ -58,7 +58,7 @@ class Direction_d : public pR::Direction_d_base
   Direction_d (int d, InputIterator first, InputIterator last)
     : Base(d, first, last) {}
 
-  Direction_d(const Direction_d<R> &d) : Base(d) {}
+
   Direction_d(const Vector_d<R> &v) : Base(v) {}
   Direction_d(int d, Base_direction, int i) : 
     Base(d,Base_direction(),i) {}

Kernel_d/include/CGAL/Kernel_d/Hyperplane_d.h

@@ -59,7 +59,6 @@ public:
   Hyperplane_d(const Point_d<R>& p, const Direction_d<R>& dir) :
     Base(p,dir) {}
 
-  Hyperplane_d(const Hyperplane_d<R> &h) : Base(h) {}
   Hyperplane_d(const Base& p) : Base(p) {}
 
   template <class InputIterator>

Kernel_d/include/CGAL/Kernel_d/Ray_d.h

@@ -114,7 +114,6 @@ starting at |s.source()|. \precond $s$ is not trivial. }*/
     "Ray_d::constructor: segment is trivial.");
 }
 
-Ray_d(const Ray_d<R>& r) : Base(r) {}
 
 /*{\Moperations 3 3}*/
 

Kernel_d/include/CGAL/Kernel_d/Segment_d.h

@@ -95,7 +95,7 @@ Segment_d(const Point_d<R>& p, const Vector_d<R>& v)
 is initialized to the segment |(p,p+v)|. }*/
  : Base( Pair(p,p+v) ) {}
 
-Segment_d(const Segment_d<R>& s) : Base(s) {}     
+
 
 /*{\Moperations 3 3}*/
 

Kernel_d/include/CGAL/Kernel_d/Sphere_d.h

@@ -136,8 +136,6 @@ initialized to the sphere through the points in |A = set [first,last)|.
 \precond $A$ consists of $d+1$ $d$-dimensional points.}*/
   Base( Rep(d,first,last) ) {}
 
-Sphere_d(const Self& c) : Base(c) {}
-~Sphere_d() {}
 
 /*{\Moperations 4 3}*/