[Gmsh] disk mesh and center point

[boolegue]

Hello,

I created a disk, when meshed, the center point (used to create the  
circle) belongs to the list of nodes, but does not belong to any  
element !
This seems to be the reason why the mesh doesn t work with my  
simulation code.
I tried to delete the center point once the geometry is done, but the  
point remains.

Is there a way not to include this unused point when writing the mesh  
to a file ?

Thanks,
Antoine.