back to canonical ROOT, to see if memory problems still persist;

--- a/src/HOL/ROOT.ML	Thu Feb 26 21:16:53 2009 +0100
+++ b/src/HOL/ROOT.ML	Thu Feb 26 22:12:41 2009 +0100
@@ -1,7 +1,5 @@
 (* Classical Higher-order Logic -- batteries included *)
 
-use_thy "Main";
-share_common_data ();
 use_thy "Complex_Main";
 
 val HOL_proofs = ! Proofterm.proofs;