cleaned up core modules and added universal flakeLocation argument

modules/system/core/default.nix

@@ -1,13 +1,5 @@
-{
-  self,
-  inputs,
-  ...
-}: {
-  flake.nixosModules.core = {
-    pkgs,
-    lib,
-    ...
-  }: let
+{self, ...}: {
+  flake.nixosModules.core = {pkgs, ...}: let
     modules = with self.nixosModules; [
       user
       bootloader
@@ -21,6 +13,7 @@
         /etc/nixos/hardware-configuration.nix
       ]
       ++ modules;
+
     services = {
       openssh.enable = true;
       avahi.enable = true;