nixos/treewide: clean up some more references to deleted qt5 things (#435823)

nixos/modules/config/qt.nix

@@ -17,11 +17,6 @@ let
       qt6Packages.qt6gtk2
     ];
     kde = [
-      libsForQt5.kio
-      libsForQt5.plasma-integration
-      libsForQt5.systemsettings
-    ];
-    kde6 = [
       kdePackages.kio
       kdePackages.plasma-integration
       kdePackages.systemsettings
@@ -36,11 +31,6 @@ let
     ];
   };
 
-  # Maps style names to their QT_QPA_PLATFORMTHEME, if necessary.
-  styleNames = {
-    kde6 = "kde";
-  };
-
   stylePackages = with pkgs; {
     bb10bright = [ libsForQt5.qtstyleplugins ];
     bb10dark = [ libsForQt5.qtstyleplugins ];
@@ -71,8 +61,8 @@ let
     ];
 
     breeze = [
-      libsForQt5.breeze-qt5
       kdePackages.breeze
+      kdePackages.breeze.qt5
     ];
 
     kvantum = [
@@ -111,10 +101,6 @@ in
         relatedPackages = [
           "qgnomeplatform"
           "qgnomeplatform-qt6"
-          [
-            "libsForQt5"
-            "plasma-integration"
-          ]
           [
             "libsForQt5"
             "qt5ct"
@@ -123,10 +109,6 @@ in
             "libsForQt5"
             "qtstyleplugins"
           ]
-          [
-            "libsForQt5"
-            "systemsettings"
-          ]
           [
             "kdePackages"
             "plasma-integration"
@@ -158,8 +140,7 @@ in
           The options are
           - `gnome`: Use GNOME theme with [qgnomeplatform](https://github.com/FedoraQt/QGnomePlatform)
           - `gtk2`: Use GTK theme with [qtstyleplugins](https://github.com/qt/qtstyleplugins)
-          - `kde`: Use Qt settings from Plasma 5.
-          - `kde6`: Use Qt settings from Plasma 6.
+          - `kde`: Use Qt settings from Plasma.
           - `lxqt`: Use LXQt style set using the [lxqt-config-appearance](https://github.com/lxqt/lxqt-config)
              application.
           - `qt5ct`: Use Qt style set using the [qt5ct](https://sourceforge.net/projects/qt5ct/)
@@ -174,10 +155,6 @@ in
         relatedPackages = [
           "adwaita-qt"
           "adwaita-qt6"
-          [
-            "libsForQt5"
-            "breeze-qt5"
-          ]
           [
             "libsForQt5"
             "qtstyleplugin-kvantum"
@@ -236,9 +213,7 @@ in
       ];
 
     environment.variables = {
-      QT_QPA_PLATFORMTHEME =
-        lib.mkIf (cfg.platformTheme != null)
-          styleNames.${cfg.platformTheme} or cfg.platformTheme;
+      QT_QPA_PLATFORMTHEME = lib.mkIf (cfg.platformTheme != null) cfg.platformTheme;
       QT_STYLE_OVERRIDE = lib.mkIf (cfg.style != null) cfg.style;
     };
 

nixos/modules/system/boot/loader/grub/grub.nix

@@ -558,7 +558,7 @@ in
 
       theme = mkOption {
         type = types.nullOr types.path;
-        example = literalExpression ''"''${pkgs.libsForQt5.breeze-grub}/grub/themes/breeze"'';
+        example = literalExpression ''"''${pkgs.kdePackages.breeze-grub}/grub/themes/breeze"'';
         default = null;
         description = ''
           Path to the grub theme to be used.