Revert "temporarily replace explicit call to kernel"

This reverts commit 43ef4e35ba.

Mesh_3/include/CGAL/Mesh_domain_with_polyline_features_3.h

@@ -443,8 +443,9 @@ private:
                               const T1& obj1,
                               const T2& obj2) const
   {
-    return CGAL::compare(CGAL::squared_distance(p, obj1),
-                         CGAL::squared_distance(p, obj2));
+    typename Kernel::Compare_distance_3 compare_distance =
+      Kernel().compare_distance_3_object();
+    return compare_distance(p,obj1,obj2);
   }
 
 public: