diff -r 7acfab8361d1 -r d796a2fd6c69 src/HOL/Integ/int_arith1.ML
--- a/src/HOL/Integ/int_arith1.ML	Thu Feb 28 17:21:48 2002 +0100
+++ b/src/HOL/Integ/int_arith1.ML	Thu Feb 28 17:46:46 2002 +0100
@@ -70,11 +70,6 @@
                                      @zadd_ac@rel_iff_rel_0_rls) 1);
 qed "le_add_iff2";
 
-(*To tidy up the result of a simproc.  Only the RHS will be simplified.*)
-Goal "u = u' ==> (t==u) == (t==u')";
-by Auto_tac;
-qed "eq_cong2";
-
 
 structure Int_Numeral_Simprocs =
 struct
@@ -206,8 +201,8 @@
   | trans_tac (Some th) = ALLGOALS (rtac (th RS trans));
 
 fun simplify_meta_eq rules =
-    mk_meta_eq o
     simplify (HOL_basic_ss addeqcongs[eq_cong2] addsimps rules)
+    o mk_meta_eq;
 
 structure CancelNumeralsCommon =
   struct