Cleaning up outdated Google results depends entirely on whether you control the...

https://dibz.me/blog/whats-the-safest-way-to-remove-a-page-without-causing-a-bigger-seo-mess-1073

Cleaning up outdated Google results depends entirely on whether you control the website. If you own the site, delete the content and ensure it returns a proper 404 error code—avoid "soft 404s" where the page still technically exists