nomacs: 3.21.1 -> 3.22.0

Diff: https://github.com/nomacs/nomacs/compare/3.21.1...3.22.0

Changelog: https://github.com/nomacs/nomacs/releases/tag/3.22.0

`novomesk/nomacs-plugins` was merged into the main `nomacs/nomacs`
repository in:

```gitcommit
commit 326ce6257865c710464d818ed6a880a0116058be
Merge: 03997 20101
Author: Scrubs <scrubbbbs@gmail.com>
Date:   Mon Jun 23 19:43:44 2025 -0500

    Add 'ImageLounge/plugins/' from commit '20101da282f13d3184ece873388e1c234a79b5e7'

    git-subtree-dir: ImageLounge/plugins
    git-subtree-mainline: 0399773e3cdce75aca6b591f6ffd71a9362e9d8b
    git-subtree-split: 20101da282f13d3184ece873388e1c234a79b5e7
```

It has been updated to compile with Qt6 and reformatted.  While
`novomesk/nomacs-plugins` does not compile with 3.22.0 any more, due to
the Qt version update.

pkgs/by-name/no/nomacs/package.nix

@@ -13,8 +13,8 @@
 }:
 stdenv.mkDerivation (finalAttrs: {
   pname = "nomacs";
-  version = "3.21.1";
-  hash = "sha256-RRa19vj7iTtGzdssdtHVOsDzS4X+p1HeiZKy8EIWxq8=";
+  version = "3.22.0";
+  hash = "sha256-yheDM92AtojGXCx0UrK5gBvQgyGSxcsKPzl93HpHRt8=";
 
   src = fetchFromGitHub {
     owner = "nomacs";
@@ -24,13 +24,6 @@ stdenv.mkDerivation (finalAttrs: {
     inherit (finalAttrs) hash;
   };
 
-  plugins = fetchFromGitHub {
-    owner = "novomesk";
-    repo = "nomacs-plugins";
-    rev = "20101da282f13d3184ece873388e1c234a79b5e7";
-    hash = "sha256-gcRc4KoWJQ5BirhLuk+c+5HwBeyQtlJ3iyX492DXeVk=";
-  };
-
   outputs = [
     "out"
   ]
@@ -39,13 +32,6 @@ stdenv.mkDerivation (finalAttrs: {
 
   sourceRoot = "${finalAttrs.src.name}/ImageLounge";
 
-  postUnpack = ''
-    rm -rf $sourceRoot/plugins
-    mkdir $sourceRoot/plugins
-    cp -r ${finalAttrs.plugins}/* $sourceRoot/plugins/
-    chmod -R +w $sourceRoot/plugins
-  '';
-
   nativeBuildInputs = [
     cmake
     qt6.wrapQtAppsHook