idrisPackages: Clean up packages

pkgs/development/idris-modules/trees.nix

@@ -1,16 +1,14 @@
 { build-idris-package
 , fetchFromGitHub
-, prelude
 , contrib
 , bi
 , lib
-, idris
 }:
 build-idris-package  {
   name = "trees";
   version = "2018-03-19";
 
-  idrisDeps = [ prelude contrib bi ];
+  idrisDeps = [ contrib bi ];
 
   src = fetchFromGitHub {
     owner = "clayrat";
@@ -23,6 +21,5 @@ build-idris-package  {
     description = "Trees in Idris";
     homepage = https://github.com/clayrat/idris-trees;
     maintainers = [ lib.maintainers.brainrape ];
-    inherit (idris.meta) platforms;
   };
 }