Revert "nixpkgs: patching test"

This reverts commit 6204949bdc.

flake.nix

@@ -70,6 +70,7 @@
   outputs =
     {
       self,
+      nixpkgs,
       lanzaboote,
       nixos-hardware,
       home-manager,
@@ -85,26 +86,15 @@
         "yarn"
       ];
       niri-package = inputs.niri.packages.${system}.niri-unstable;
-
-      patchedNixpkgsSrc = (import inputs.nixpkgs { inherit system; }).applyPatches {
-        name = "nixpkgs-patched";
-        src = inputs.nixpkgs;
-        patches = [ ./0001-feat-make-boot-messages-configureable.patch ];
-      };
-
-      patchedNixpkgs = import patchedNixpkgsSrc { inherit system; };
     in
     {
-      formatter.${system} = patchedNixpkgs.nixfmt-rfc-style;
+      formatter.${system} = nixpkgs.legacyPackages.${system}.nixfmt-rfc-style;
 
-      nixosConfigurations = patchedNixpkgs.lib.foldl' (
+      nixosConfigurations = nixpkgs.lib.foldl' (
         config: hostname:
         config
         // {
-          "${hostname}" = import "${patchedNixpkgsSrc}/nixos/lib/eval-config.nix" {
-            lib = patchedNixpkgs.lib;
-            baseModules = import "${patchedNixpkgsSrc}/nixos/modules/module-list.nix";
-            inherit system;
+          "${hostname}" = nixpkgs.lib.nixosSystem {
             specialArgs = {
               inherit
                 inputs