Remove unused fn eastwood.util/uri? that name-collided with new Cloju…

…re 1.9 fn

The definition was exactly the same, and eastwood.util/uri? wasn't
being used anywhere in Eastwood code, anyway.

src/eastwood/util.clj

@@ -64,9 +64,6 @@ print-cb is called once for each line of output."
            print-cb))))
 
 
-(defn uri? [obj]
-  (instance? java.net.URI obj))
-
 ;; ordering-map copied under Eclipse Public License v1.0 from useful
 ;; library available at: https://github.com/flatland/useful