Remove sublib dep work around

Author: hamishmack

test/cabal-sublib/default.nix

@@ -10,13 +10,6 @@ let
       #   haddock: No input file(s)
       packages.cabal-sublib.doHaddock = false;
     }
-    # TODO fix plan-to-nix so this is not needed.
-    # This is a manual work around for `plan-to-nix` not
-    # handling `build-depends: cabal-sublib:slib` correctly
-    ({config, ...}: {
-      packages.cabal-sublib.components.exes.cabal-sublib.depends = [
-        config.hsPkgs.cabal-sublib.components.sublibs.slib ];
-    })
   ];
 
   # The ./pkgs.nix works for linux & darwin, but not for windows