Remove duplicate imports

This bugged me today when I tried to build the plugin.
They're all imported by Quicksilver.pch from the Configuration folder

P.S. I was playing with the plugin to see if you'd worked out how to read the Chrome history cache files?
I know that Chrome stores the text for each page visited somewhere, since you can search for any text on a page in the history view (⌘Y).
But it bugs me that I can't actually see the text - for offline browsing. I want to try and find the original content and make it viewable :)