If you need to hide pages from search results, start by adding a "noindex" tag...

https://emilioezho292.theglensecret.com/what-s-the-best-checklist-to-deindex-a-page-you-control

If you need to hide pages from search results, start by adding a "noindex" tag to the page code. This tells Google to drop the content from its index permanently. If the page is already gone, return a 404 or 410 status code