src/HOL/Cardinals/Cardinal_Arithmetic.thy

--- a/src/HOL/Cardinals/Cardinal_Arithmetic.thy	Wed Jul 18 12:21:55 2018 +0200
+++ b/src/HOL/Cardinals/Cardinal_Arithmetic.thy	Thu Jul 19 09:10:22 2018 +0100
@@ -8,7 +8,7 @@
 section \<open>Cardinal Arithmetic\<close>
 
 theory Cardinal_Arithmetic
-imports HOL.BNF_Cardinal_Arithmetic Cardinal_Order_Relation
+imports Cardinal_Order_Relation
 begin
 
 subsection \<open>Binary sum\<close>