meta(home-manager): Remove dependency on extraSpecialArgs

Makes copy/pasting easier and removes non-standard arguments in
home-manager modules.

home/eww.nix

@@ -1,11 +1,13 @@
 {
-  nix-config,
+  nixosConfig,
   pkgs,
   config,
   ...
 }:
 
 let
+  inherit (nixosConfig._module.specialArgs) nix-config;
+
   inherit (config.home) homeDirectory;
   inherit (config.lib.stylix.colors.withHashtag) base00 base05;
   inherit (nix-config.packages.${pkgs.system}) fluent-icons;

home/gtk.nix

@@ -1,11 +1,13 @@
 {
-  nix-config,
+  nixosConfig,
   config,
   pkgs,
   ...
 }:
 
 let
+  inherit (nixosConfig._module.specialArgs) nix-config;
+
   phosh-backgrounds = nix-config.packages.${pkgs.system}.phosh-backgrounds.override {
     color = config.lib.stylix.colors.base00;
   };

home/hyprland.nix

@@ -1,11 +1,13 @@
 {
-  nix-config,
+  nixosConfig,
   pkgs,
   lib,
   ...
 }:
 
 let
+  inherit (nixosConfig._module.specialArgs) nix-config;
+
   inherit (lib) mkForce;
   inherit (nix-config.packages.${pkgs.system}) osu-backgrounds;
 

home/ironbar.nix

@@ -1,5 +1,5 @@
 {
-  nix-config,
+  nixosConfig,
   config,
   lib,
   pkgs,
@@ -7,6 +7,8 @@
 }:
 
 let
+  inherit (nixosConfig._module.specialArgs) nix-config;
+
   inherit (lib) singleton;
   inherit (builtins) toJSON;
   inherit (nix-config.packages.${pkgs.system}) dunst-scripts;

home/librewolf.nix

@@ -1,12 +1,13 @@
 {
   pkgs,
   lib,
-  nix-config,
   nixosConfig,
   ...
 }:
 
 let
+  inherit (nixosConfig._module.specialArgs) nix-config;
+
   inherit (lib) mkIf singleton;
   inherit (nix-config.packages.${pkgs.system}) friendlyfox;
 

modules/system.nix

@@ -187,10 +187,6 @@ in
 
         homeDirectory = "/home/${username}";
       };
-
-      extraSpecialArgs = {
-        inherit nix-config;
-      };
     };
 
     virtualisation.vmVariant = {