home: cleanup pkgs import and patching

etcnixos/system-mreow.nix

@@ -88,7 +88,6 @@
     '';
   };
 
-
   programs.gamescope = {
     enable = true;
     capSysNice = true;

home-manager/flake.nix

@@ -46,9 +46,8 @@
       homeDirectory = "/home/${username}";
       hostname = nixpkgs.lib.strings.removeSuffix "\n" (builtins.readFile /etc/hostname);
 
-      pkgs' =
+      pkgs = import (
         (import nixpkgs {
-          system = "x86_64-linux";
         }).applyPatches
         {
           name = "nixpkgs";
@@ -68,10 +67,8 @@
               sha256 = "1sc65jfx5ngsa4zkfnybg6ma65g2wgzd6ac1gajxwqni5470i5rq";
             })
           ];
-          };
-      pkgs = import pkgs' {
-        system = "x86_64-linux";
-      };
+        }
+      ) { };
     in
     {
       formatter.x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.nixfmt-rfc-style;