vacuum: drop, unmaintained upstream since 2021

https://github.com/Vacuum-IM/vacuum-im

pkgs/applications/networking/instant-messengers/vacuum/default.nix

@@ -1,55 +0,0 @@
-{
-  stdenv,
-  lib,
-  fetchFromGitHub,
-  qtbase,
-  qttools,
-  qtx11extras,
-  qtmultimedia,
-  qtwebkit,
-  wrapQtAppsHook,
-  cmake,
-  openssl,
-  xorgproto,
-  libx11,
-  libxscrnsaver,
-  xz,
-  zlib,
-}:
-stdenv.mkDerivation {
-  pname = "vacuum-im";
-  version = "unstable-2021-12-09";
-
-  src = fetchFromGitHub {
-    owner = "Vacuum-IM";
-    repo = "vacuum-im";
-    rev = "0abd5e11dd3e2538b8c47f5a06febedf73ae99ee";
-    sha256 = "0l9pln07zz874m1r6wnpc9vcdbpgvjdsy49cjjilc6s4p4b2c812";
-  };
-
-  nativeBuildInputs = [
-    wrapQtAppsHook
-    cmake
-  ];
-  buildInputs = [
-    qtbase
-    qttools
-    qtx11extras
-    qtmultimedia
-    qtwebkit
-    openssl
-    xorgproto
-    libx11
-    libxscrnsaver
-    xz
-    zlib
-  ];
-
-  meta = {
-    description = "XMPP client fully composed of plugins";
-    maintainers = [ lib.maintainers.raskin ];
-    platforms = lib.platforms.linux;
-    license = lib.licenses.gpl3;
-    homepage = "http://www.vacuum-im.org";
-  };
-}

pkgs/top-level/aliases.nix

@@ -2076,6 +2076,7 @@ mapAliases {
   utilmacros = util-macros; # Added 2025-02-04
   vaapiIntel = throw "'vaapiIntel' has been renamed to/replaced by 'intel-vaapi-driver'"; # Converted to throw 2025-10-27
   vaapiVdpau = throw "'vaapiVdpau' has been renamed to/replaced by 'libva-vdpau-driver'"; # Converted to throw 2025-10-27
+  vacuum = throw "'vacuum' has been removed as upstream Vacuum-IM has been unmaintained since December 2021"; # Added 2026-04-26
   valum = throw "'valum' has been removed because it has been marked as broken since at least November 2024."; # Added 2025-10-01
   vamp.vampSDK = throw "'vamp.vampSDK' has been renamed to/replaced by 'vamp-plugin-sdk'"; # Converted to throw 2025-10-27
   vapoursynth-nnedi3 = throw "'vapoursynth-nnedi3' has been removed per upstream. Use vapoursynth-znedi3 instead."; # Added 2026-04-20

pkgs/top-level/all-packages.nix

@@ -3453,8 +3453,6 @@ with pkgs;
 
   usort = with python3Packages; toPythonApplication usort;
 
-  vacuum = libsForQt5.callPackage ../applications/networking/instant-messengers/vacuum { };
-
   vimpager = callPackage ../tools/misc/vimpager { };
   vimpager-latest = callPackage ../tools/misc/vimpager/latest.nix { };