refactor(system): flatten

inputs/system/modules/base/host/hardware/gpu/nvidia/default.nix

@@ -1,51 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-let
-  gpu = config.systemModules.host.hardware.gpu;
-  inherit (lib) mkIf mkDefault;
-  inherit (builtins) elem;
-  production = config.boot.kernelPackages.nvidiaPackages.production;
-  # beta = config.boot.kernelPackages.nvidiaPackages.beta;
-in
-
-{
-# TODO: make option to choose nvidia package
-  config = mkIf (elem gpu.type ["nvidia"]) {
-    hardware = {
-      nvidia = {
-        open = mkDefault true;
-        package = production;
-        forceFullCompositionPipeline = true;
-        nvidiaSettings = false;
-        nvidiaPersistenced = true;
-        modesetting.enable = true;
-        powerManagement = {
-          enable = mkDefault true;
-          finegrained = mkDefault false;
-        };
-      };
-      opengl = {
-        extraPackages = with pkgs; [ nvidia-vaapi-driver ];
-        extraPackages32 = with pkgs.pkgsi686Linux; [ nvidia-vaapi-driver ];
-      };
-    };
-    environment.systemPackages = with pkgs; [
-
-      libva
-      libva-utils
-
-      vulkan-loader
-      vulkan-validation-layers
-      vulkan-tools
-      vulkan-extension-layer
-
-      mesa
-
-      nvtopPackages.nvidia
-    ];
-    environment.sessionVariables = {
-      LIBVA_DRIVER_NAME = "nvidia";
-      NVD_BACKEND = "direct";
-    };
-  };
-}