src/Tools/Code/code_simp.ML

--- a/src/Tools/Code/code_simp.ML	Wed Oct 20 17:11:46 2021 +0200
+++ b/src/Tools/Code/code_simp.ML	Wed Oct 20 18:13:17 2021 +0200
@@ -26,7 +26,6 @@
 (
   type T = simpset;
   val empty = empty_ss;
-  val extend = I;
   val merge = merge_ss;
 );