Deleting an item from a collection
If you are hosting content on Apple servers, you can use the feed editor to delete content from your site.
To delete an item from a collection:
Click Collections at the top of iTunes U Public Site Manager.
Click Apple Hosted in the Feed column for the collection where you want to delete an item.
As a contributor, click Edit Feed in the Title column for the collection where you want to delete an item.
Hover the pointer over the item you want to delete.
Click the Trash button, and then click OK.
If you update a collection (for example, you add or remove an item, update a category, or edit a feed), you do not need to publish your site for the changes to appear in iTunes U in the iTunes Store. Changes not requiring you to publish your site can take up to 12 hours to appear in the iTunes Store (provider-hosted content can take up to 48 hours). To force an update sooner, click the Refresh button in the Actions button bar in the collections manager.