*remove warnings.

In particular remove UNTESTED_XXXXXXXXXXX unused variable that possibly hide true warnings. 
In those cases, the string printed while executed now starts with "NOTE: ".
*CGAL internal code no longer rely on depecrated features

Cartesian_kernel/include/CGAL/Cartesian/function_objects.h

@@ -994,7 +994,7 @@ namespace CartesianKernelFunctors {
     { return c.rep().squared_radius(); }
 
     result_type
-    operator()( const Point_2& p) const
+    operator()( const Point_2& /*p*/) const
     { return FT(0); }
 
     result_type
@@ -1041,7 +1041,7 @@ namespace CartesianKernelFunctors {
     { return c.rep().squared_radius(); }
 
     result_type
-    operator()( const Point_3& p) const
+    operator()( const Point_3& /*p*/) const
     { return FT(0); }
 
     result_type