idrisPackages: Clean up packages

pkgs/development/idris-modules/rationals.nix

@@ -1,16 +1,13 @@
-{ curl
-, build-idris-package
+{ build-idris-package
 , fetchFromGitHub
-, prelude
 , contrib
 , lib
-, idris
 }:
 build-idris-package {
   name = "rationals";
   version = "2017-04-29";
 
-  idrisDeps = [ prelude contrib ];
+  idrisDeps = [ contrib ];
 
   src = fetchFromGitHub {
     owner = "mcgordonite";
@@ -22,7 +19,6 @@ build-idris-package {
   meta = {
     description = "An idris rational number type built from paths in the Stern Brocot tree";
     homepage = https://github.com/mcgordonite/idris-binary-rationals;
-    inherit (idris.meta) platforms;
     maintainers = [ lib.maintainers.brainrape ];
   };
 }