kanboard: remove

This was far from being an idiomatic package. It merely downloaded and
copied the source to its output, and did not provide any affordances
for actually running the application, so the package is not very useful.

pkgs/applications/misc/kanboard/default.nix

@@ -1,27 +0,0 @@
-{ lib, stdenv, fetchFromGitHub }:
-
-stdenv.mkDerivation rec {
-  pname = "kanboard";
-  version = "1.2.26";
-
-  src = fetchFromGitHub {
-    owner = "kanboard";
-    repo = "kanboard";
-    rev = "v${version}";
-    sha256 = "sha256-/Unxl9Vh9pEWjO89sSviGGPFzUwxdb1mbOfpTFTyRL0=";
-  };
-
-  dontBuild = true;
-
-  installPhase = ''
-    mkdir -p $out/share/kanboard
-    cp -rv . $out/share/kanboard
-  '';
-
-  meta = with lib; {
-    description = "Kanban project management software";
-    homepage = "https://kanboard.org";
-    license = licenses.mit;
-    maintainers = with maintainers; [ lheckemann ];
-  };
-}

pkgs/top-level/all-packages.nix

@@ -30350,8 +30350,6 @@ with pkgs;
 
   kail = callPackage ../tools/networking/kail {  };
 
-  kanboard = callPackage ../applications/misc/kanboard { };
-
   kapitonov-plugins-pack = callPackage ../applications/audio/kapitonov-plugins-pack { };
 
   kapow = libsForQt5.callPackage ../applications/misc/kapow { };