How to get your content removed from Google
The Google Webmaster Blog outlines a few methods that site owners can use in order to ensure their content is not indexed by the search engine. This can include a simple robots.txt file that either blocks Google completely or blocks certain directories on a server. The best way to go about removal however, is to verify the ownership of your site through Google's webmaster tools by inserting a small line of code in a webpage. There is a diagnostic tab there called URL Removals. From there you can submit a New Removal Request and choose to remove Individual URLs, a directory, your entire site, or cached copies.
Of course if you end up changing your mind, Google also has a way to reinclude content. Keep in mind, either way could take a few months or more to refresh on all of Google's servers.