A Google Webmaster Help thread has a searcher asking Google how they can remove a Facebook page from Google. The page has been deleted from Facebook, but it still shows up in the Google Cache.
Googler, Wysz, gave the searcher a detailed explanation of how he can remove this Facebook page. I’ll quote him word for word:
So go to this document to learn more and if you have questions, hit Wyzs up in the thread.
Forum discusison at Google Webmaster Help.