What happens to official DLC that was removed from Steam?

Songs that Ubisoft released as official DLC are marked Official DLC on Ignition. There is no download for them here. On those rows the download button is a cart that shows purchase options.

Ubisoft can take official DLC off the store, which is called delisting.

• Our CDLC Agreement does not allow CDLC of official songs. A delisted song can't be charted and uploaded here.
• The Wishlist refuses official DLC, so it can't be requested there either.
• Posting or uploading official DLC, or CDLC recreated from it, can get your account suspended or banned.

Our partner site, The Riff Repeater, has a page for the Rocksmith 2014 DLC: Rocksmith 2014 DLC.