Revert "#1057422 Notifications: onDBDelete uses notifications.deleteContentIfOrphan"

This reverts commit 8279cebb.

entity/Notification_entity/Notification_entity.aod

@@ -166,7 +166,6 @@
       <fromClauseProcess>%aditoprj%/entity/Notification_entity/recordcontainers/db/fromClauseProcess.js</fromClauseProcess>
       <conditionProcess>%aditoprj%/entity/Notification_entity/recordcontainers/db/conditionProcess.js</conditionProcess>
       <orderClauseProcess>%aditoprj%/entity/Notification_entity/recordcontainers/db/orderClauseProcess.js</orderClauseProcess>
-      <onDBDelete>%aditoprj%/entity/Notification_entity/recordcontainers/db/onDBDelete.js</onDBDelete>
       <linkInformation>
         <linkInformation>
           <name>c4e34b96-6081-4d04-8377-040a8ed3e14c</name>

entity/Notification_entity/recordcontainers/db/onDBDelete.js

-import("system.vars");
-import("system.notification");
-
-// Deletes notificationContents from its table, if there are no
-notification.deleteContentIfOrphan(vars.get("$field.ID"), vars.get("$field.CONTENTID"));
\ No newline at end of file