distro: lout: Comment out dependency on Ghostscript.

* distro/packages/lout.scm (lout): Temporarily comment out dependency on
  Ghostscript as this was causing evaluation errors on Hydra.

distro/packages/lout.scm

@@ -88,8 +88,11 @@ (define out
                "12gkyqrn0kaa8xq7sc7v3wm407pz2fxg9ngc75aybhi5z825b9vq"))))
     (build-system gnu-build-system)               ; actually, just a makefile
     (outputs '("out" "doc"))
-    (inputs `(("ghostscript" ,(lambda _    ; FIXME: replace with our own
-                                (nixpkgs-derivation "ghostscript")))))
+    (inputs
+     `(;; FIXME: Add dependency on Ghostscript.
+       ;; ("ghostscript" ,(lambda _
+       ;;                   (nixpkgs-derivation "ghostscript")))
+       ))
     (arguments `(#:modules ((guix build utils)
                             (guix build gnu-build-system)
                             (srfi srfi-1))        ; we need SRFI-1