Index: polygon_act.c
===================================================================
--- polygon_act.c	(revision 17697)
+++ polygon_act.c	(revision 17698)
@@ -36,7 +36,6 @@
 
 #include "board.h"
 #include "data.h"
-#include "action_helper.h"
 #include "undo.h"
 #include "funchash_core.h"