Update package.nix

Author: ursi

package.nix

@@ -1,7 +1,5 @@
 { ps-pkgs, ps-pkgs-ns, ... }:
   with ps-pkgs;
   { version = "0.1.3";
-    repo = "https://github.com/ursi/purescript-point-free.git";
-    rev = "77a43a9eb14d8e21cf8e37341c5cbd019ad826a1";
     dependencies = [ prelude ];
   }