diff -r f90e3926e627 -r d31650b377c4 src/HOL/Main.thy
--- a/src/HOL/Main.thy	Wed Aug 10 22:05:36 2016 +0200
+++ b/src/HOL/Main.thy	Wed Aug 10 22:34:14 2016 +0200
@@ -1,7 +1,7 @@
 section \<open>Main HOL\<close>
 
 theory Main
-imports Predicate_Compile Quickcheck_Narrowing Extraction Coinduction Nitpick BNF_Greatest_Fixpoint Filter Conditionally_Complete_Lattices
+imports Predicate_Compile Quickcheck_Narrowing Extraction Nitpick BNF_Greatest_Fixpoint Filter Conditionally_Complete_Lattices
 begin
 
 text \<open>