src/Tools/try.ML

--- a/src/Tools/try.ML	Wed Oct 20 17:11:46 2021 +0200
+++ b/src/Tools/try.ML	Wed Oct 20 18:13:17 2021 +0200
@@ -39,7 +39,6 @@
 (
   type T = tool list;
   val empty = [];
-  val extend = I;
   fun merge data : T = Ord_List.merge tool_ord data;
 );