You can remove content published to an external website
  directly from the document library.
    This task assumes you are in the library of the desired
    site.
    - 
        Navigate the library’s folder structure to locate the content you
        want to unpublish.
        
You can move a content item or a folder. When you relocate a folder all of its content, including subfolders, move with it.
 - Click the name or thumbnail of the desired item in the list to display the details page.
 - Locate the currently published version in the Publishing History section.
 - 
        Click the Unpublish icon to the right of
        the content to remove it from its external location.
        
A message prompts you to confirm the action.
 - 
        Click OK.
        
A message lets you know that the content has been placed in a queue to be unpublished.
A new event appears in the Publishing History list. Once complete the status displays Unpublished. Refresh the page as necessary to update the status.