Deleting an Announcement
You can delete an announcement when it is no longer required. Note that announcements do not have an expiration date. You have to manually delete them when you no longer want them displayed in the App Store.
This short guide will show you step by step how to:
Delete Announcement
Using your preferred web browser, navigate to the URL for your Apporto system, for example, “mycollege.apporto.com”, and log in to the system using your Admin credentials.
Click the Announcements 
icon in the Navigation panel.
The ‘Announcements’ screen displays.
Click the Operations 
dropdown for the announcement you want to edit, then choose Delete.
The ‘Delete Announcement’ dialog displays.
Click Confirm to complete the deletion.
Click the Cancel link to cancel the deletion and leave the announcement intact.