Eleminate unused functions from luac

["J.Jørgen von Bargen" <jjvb.primus@...>]

I just wonder about

1) I have a module"utils"
   with a lot of helpfull functions

2) I have an application which
   require"utils"
   calls only some to the lot

3) I compile the module and the application to one application.luac

Now I have a lot of code in the luac, which is never called, thus could 
be eleminated.

Is there a tool for this? (Assuming, no function calls are constructed 
at runtime)
Would it be possible?

Regards