Remove liberator.dev’s dependency on compojure.

I believe this is a fix for liberator.dev's dependency on compojure. ( https://github.com/clojure-liberator/liberator/issues/103 )
This lets me use liberator.dev with bidi.
Hi, Philipp.  Missed you at Clojure Conj!

There was a reason, but I don't remember what it was anymore. :-/