prison: remove

this has long been replaced with what we have as libsForQt5.prison now

pkgs/development/libraries/prison/default.nix

@@ -1,21 +0,0 @@
-{ lib, stdenv, fetchurl, cmake, qrencode, qt4, libdmtx }:
-
-stdenv.mkDerivation rec {
-  pname = "prison";
-  version = "1.0";
-
-  src = fetchurl {
-    url = "mirror://kde/stable/prison/${version}/src/prison-${version}.tar.gz";
-    sha256 = "08hkzzda36jpdywjqlyzcvli7cx17h4l9yffzsdnhdd788n28krr";
-  };
-
-  buildInputs = [ qt4 qrencode libdmtx ];
-
-  nativeBuildInputs = [ cmake ];
-
-  meta = {
-    description = "Qt4 library for QR-codes";
-    license = lib.licenses.mit;
-    inherit (qt4.meta) platforms;
-  };
-}

pkgs/top-level/all-packages.nix

@@ -24698,8 +24698,6 @@ with pkgs;
 
   primesieve = callPackage ../applications/science/math/primesieve { };
 
-  prison = callPackage ../development/libraries/prison { };
-
   proj = callPackage ../development/libraries/proj { };
 
   proj_7 = callPackage ../development/libraries/proj/7.nix { };