Här har du Googles tips hur du skall göra..
If you don't own the site,
your first step is to contact the site's webmaster and request that the content is removed. (Note that depending on the type of removal—see below—some other changes may also be necessary). Once the changes have been made, you can request removal of the content from appearing as a cache copy or snippet in Google's search results by using the public URL removal tool. (It bears repeating: The site owner—whether it's you or somebody else—must have first made the required changes to the site, or this process will not work to remove the content from search results.)
Följ denna gide.
If you don't own the site
1. Go to http://www.google.com/webmasters/tools/removals
2. If you're not immediately taken to the 'Create a new request' page, click New Removal Request.
3. Select the second radio button (Outdated or 'dead' link in the Google search results...), and then click Next.
4. Tell us whether this is a Google Web Search or Google Images result and the URL of the 'dead' link (not the Google search results URL or cached page URL). How to find the right URL. Note that the URL is case-sensitive—you will need to submit the URL using exactly the same characters and the same capitalization that the site uses.
5. Click Submit Request.
Johan