This type of information is withheld by HubPages for Security and Statistical purposes. We are not Moderators and we can not remove a Hub personally, as Individual Hubbers.
As D22314 says, the only way to know if a Hub or Hubber has been removed is to Bookmark the Hubber/Hub Article and frequently check it. I had started doing this awhile ago when I was Hub Hopping like crazy, but eventually I realized that it was a waste of my time.
HubPages has a great staff of Moderators that work hard to evaluate and remove content that does not meet HubPages' standards. As long as we Hubbers continue to Flag the Hubs and Hubbers that Violate the site, the Moderators will work diligently to ensure that the bad content is removed.
I know it can be frustrating when we don't know if our Flagging Efforts are making a difference because we don't receive this feedback. I think in the long run it is a good thing because we may become more focused on looking for violations instead of creating new Hub Articles ourselves. My advice is to keep Flagging whatever violates the HubPages Publishing Guidelines, Comment on the Hubs you enjoyed reading, and Keep Writing Great Content! That is what will make HubPages a "Safer" Place!
I hope this helps answer your question! Happy Hubbing!