A business with two partners and a website have parted ways. The website is now just a single static page with contact info for the partners. Searches for these partners still returns this website, before other more relevant results from their new business ventures. Redirects are not a good idea because of the split.
What is the best way to remove the old site from the internet? The question was asked of me in a Google-specific context, but a more general answer would be helpful.