isabelle-2021 arm: update SimplExportAndRefine

Signed-off-by: Gerwin Klein <gerwin.klein@proofcraft.systems>

proof/asmrefine/SEL4GraphRefine.thy

@@ -73,6 +73,10 @@ val dbg = ProveSimplToGraphGoals.new_debug
   };
 \<close>
 
+context
+includes no_take_bit
+begin
+
 (* If this fails, it can be debugged with the assistance of the
    script in TestGraphRefine.thy *)
 ML \<open>
@@ -95,3 +99,5 @@ val _ = ProveSimplToGraphGoals.print dbg "successes:" #successes;
 end
 
 end
+
+end