displaycal: drop

Last release from 2019, hasn't migrated to python3.

```
Traceback (most recent call last):
  File "/build/DisplayCAL-3.8.9.3/nix_run_setup", line 8, in <module>
    exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\\r\\n', '\\n'), __file__, 'exec'))
  File "setup.py", line 258
    print "Bumping version number %s ->" % \
          ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Bumping version number %s ->" % \)?
```

pkgs/applications/graphics/displaycal/default.nix

@@ -1,72 +0,0 @@
-{ python2
-, lib
-, fetchurl
-, pkg-config
-, libXext
-, libXxf86vm
-, libX11
-, libXrandr
-, libXinerama
-, libXScrnSaver
-, argyllcms
- }:
-
-let
-  inherit (python2.pkgs) buildPythonApplication wxPython numpy dbus-python;
-in buildPythonApplication rec {
-  pname = "displaycal";
-  version = "3.8.9.3";
-
-  enableParallelBuilding = true;
-
-  src = fetchurl {
-    url = "mirror://sourceforge/project/dispcalgui/release/${version}/DisplayCAL-${version}.tar.gz";
-    sha256 = "1sivi4q7sqsrc95qg5gh37bsm2761md4mpl89hflzwk6kyyxyd3w";
-  };
-
-  propagatedBuildInputs = [
-    libXext
-    libXxf86vm
-    libX11
-    libXrandr
-    libXinerama
-    libXScrnSaver
-    argyllcms
-    wxPython
-    numpy
-    dbus-python
-  ];
-
-  nativeBuildInputs = [
-    pkg-config
-  ];
-
-  preConfigure = ''
-    mkdir dist
-    cp {misc,dist}/net.displaycal.DisplayCAL.appdata.xml
-    touch dist/copyright
-    mkdir -p $out
-    ln -s $out/share/DisplayCAL $out/Resources
-  '';
-
-  # no idea why it looks there - symlink .json lang (everything)
-  postInstall = ''
-    for x in $out/share/DisplayCAL/*; do
-      ln -s $x $out/lib/python2.7/site-packages/DisplayCAL
-    done
-
-    for prog in "$out/bin/"*; do
-      wrapProgram "$prog" \
-        --prefix PYTHONPATH : "$PYTHONPATH" \
-        --prefix PATH : ${argyllcms}/bin
-    done
-  '';
-
-  meta = {
-    description = "Display Calibration and Characterization powered by Argyll CMS";
-    homepage = "https://displaycal.net/";
-    license = lib.licenses.gpl3;
-    maintainers = [lib.maintainers.marcweber];
-    platforms = lib.platforms.linux;
-  };
-}

pkgs/top-level/aliases.nix

@@ -217,6 +217,7 @@ mapAliases ({
   desktop_file_utils = desktop-file-utils; # added 2018-02-25
   devicemapper = lvm2; # added 2018-04-25
   digikam5 = digikam; # added 2017-02-18
+  displaycal = throw "displaycal has been removed from nixpkgs, as it hasn't migrated to python3."; # added 2022-01-12
   dmtx = dmtx-utils; # added 2018-04-25
   dnnl = oneDNN; # added 2020-04-22
   docbook5_xsl = docbook_xsl_ns; # added 2018-04-25

pkgs/top-level/all-packages.nix

@@ -30229,8 +30229,6 @@ with pkgs;
 
   digikam = libsForQt5.callPackage ../applications/graphics/digikam {};
 
-  displaycal = callPackage ../applications/graphics/displaycal {};
-
   drumkv1 = libsForQt5.callPackage ../applications/audio/drumkv1 { };
 
   ### GAMES