How To Delete Something From Google’s Cache
One of the many frustrations of operating a website is that stuff you don’t necessarily want people to find is often still available in one cache or another. Google operates one of these. So here’s the question: how do you delete data from the Google cache?
Simple: instead of just deleting the page, delete most — not all — of the content on it. Let the Google bot come around and index the new, empty content. Once you have verified that Google has cached the empty content, you can safely delete the page.
That’s it!