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src/Pure/sign.ML
changeset 74561 8e6c973003c8
parent 74330 d882abae3379
child 77889 5db014c36f42 
--- a/src/Pure/sign.ML	Wed Oct 20 17:11:46 2021 +0200
+++ b/src/Pure/sign.ML	Wed Oct 20 18:13:17 2021 +0200
@@ -134,7 +134,6 @@
 structure Data = Theory_Data'
 (
   type T = sign;
-  val extend = I;
   val empty = make_sign (Syntax.empty_syntax, Type.empty_tsig, Consts.empty);
   fun merge old_thys (sign1, sign2) =
     let
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