The context

I'm getting the following (see screenshot below) when visiting the Stack Exchange Data Dump in the Internet Archive. Here's the URL.

This item is no longer available.

Items may be taken down for various reasons, including by decision of the uploader or due to a violation of our Terms of Use

Because the data dump is no longer available, it is not listed in the list of items uploaded by Stack Exchange in the Internet Archive (see screenshot below)

The question

Why is the data dump no longer available in the Internet Archive?