src/ZF/ROOT.ML

remove unnecessary error handling code

(*  Title:      ZF/ROOT.ML
    ID:         $Id$
    Author:     Lawrence C Paulson, Cambridge University Computer Laboratory
    Copyright   1993  University of Cambridge

Zermelo-Fraenkel Set Theory on top of classical First-Order Logic.
This theory is the work of Martin Coen, Philippe Noel and Lawrence
Paulson.
*)

use_thys ["Main", "Main_ZFC"];