Remove left-over use of integer error code in classloader eval.

leiningen-core/src/leiningen/core/eval.clj

@@ -177,16 +177,11 @@
 (defmethod eval-in :classloader [project form]
   (let [classpath   (map io/file (classpath/get-classpath project))
         classloader (cl/classlojure classpath)]
-    ;; TODO: special-case :java.library.path
     (doseq [opt (get-jvm-args project)
             :when (.startsWith opt "-D")
             :let [[_ k v] (re-find #"^-D(.*?)=(.*)$" opt)]]
       (System/setProperty k v))
-    (try (cl/eval-in classloader form)
-         0 ;; pretend to return an exit code for now
-         (catch Exception e
-           (.printStackTrace e)
-           1))))
+    (cl/eval-in classloader form)))
 
 (defmethod eval-in :leiningen [project form]
   (when (:debug project)