Cleaning up outdated Google search results comes down to whether you own the...

https://www.tumblr.com/distantlyperpetualharbinger/811810096706387968/how-to-clean-up-old-listings-after-a-site

Cleaning up outdated Google search results comes down to whether you own the site. If you control the page, delete the content and ensure it returns a proper 404 status—avoiding "soft 404s" that trick Google into keeping it live