wacca: fix v4 upgrade scripts

core/data/schema/versions/SDFE_3_rollback.sql

@@ -1,3 +1,2 @@
 SET FOREIGN_KEY_CHECKS=0;
---Can't really add items back so this just does nothing
 SET FOREIGN_KEY_CHECKS=1;

core/data/schema/versions/SDFE_4_upgrade.sql

@@ -1,3 +1 @@
-SET FOREIGN_KEY_CHECKS=0;
-DELETE FROM wacca_item WHERE type=17 AND item_id=312002;
-SET FOREIGN_KEY_CHECKS=1;
+DELETE FROM wacca_item WHERE type=17 AND item_id=312002;