Getting rid of outdated Google search results depends on one thing: do you...

https://reportz.io/technology/how-do-i-keep-dead-urls-from-creating-a-bad-user-experience-in-search/

Getting rid of outdated Google search results depends on one thing: do you control the website? If you own it, delete the content and let Google re-crawl. If you don't, use Google’s "Refresh Outdated Content" tool