fix some lint errors

configuration.nix

@@ -2,7 +2,7 @@
 # your system.  Help is available in the configuration.nix(5) man page
 # and in the NixOS manual (accessible by running ‘nixos-help’).
 
-{ config, pkgs, ... }:
+{ pkgs, ... }:
 
 {
   imports =

flake.nix

@@ -18,7 +18,6 @@
 
   outputs = { nixpkgs, home-manager, nixvim-flake, ... }:
     let
-      lib = nixpkgs.lib;
       system = "x86_64-linux";
       pkgs = import nixpkgs { inherit system; };
       inputs.nixvim-flake = nixvim-flake;

hardware-configuration.nix

@@ -1,7 +1,7 @@
 # Do not modify this file!  It was generated by ‘nixos-generate-config’
 # and may be overwritten by future invocations.  Please make changes
 # to /etc/nixos/configuration.nix instead.
-{ config, lib, pkgs, modulesPath, ... }:
+{ config, lib, modulesPath, ... }:
 
 {
   imports =

home.nix

@@ -1,4 +1,4 @@
-{ lib, pkgs, inputs, ... }: let
+{ pkgs, inputs, ... }: let
   username = "khais";
 in {
   home = {
@@ -16,7 +16,7 @@ in {
       # editors
       zed-editor
       # nixvim
-      inputs.nixvim-flake.packages.${pkgs.system}.default
+      inputs.nixvim-flake.packages.${system}.default
     ];
 
     file = {