ocamlPackages.xenstore-tool: drop postPatch

Co-authored-by: SigmaSquadron <[e-mail]>

pkgs/development/ocaml-modules/xenstore-tool/default.nix

···
 
   inherit (xenstore_transport) src version;
 
-  postPatch = ''
-    substituteInPlace cli/dune --replace 'libraries ' 'libraries camlp-streams '
-  '';
-
   buildInputs = [
     camlp-streams
     xenstore_transport