refactor variables & theme

Former-commit-id: 276756d998

hosts/laptop/configuration.nix

@@ -1,26 +1,19 @@
 { config, ... }: {
   imports = [
+    # Mostly system related configuration
     ../../nixos/nvidia.nix # CHANGEME: Remove this line if you don't have an Nvidia GPU
-    ../../nixos/prime.nix # CHANGEME: Remove this line if you don't have an Nvidia GPU
-
     ../../nixos/audio.nix
     ../../nixos/bluetooth.nix
     ../../nixos/fonts.nix
     ../../nixos/home-manager.nix
-    ../../nixos/network-manager.nix
     ../../nixos/nix.nix
     ../../nixos/systemd-boot.nix
-    ../../nixos/timezone.nix
     ../../nixos/tuigreet.nix
     ../../nixos/users.nix
     ../../nixos/utils.nix
-    ../../nixos/xdg-portal.nix
-    ../../nixos/docker.nix
-    ../../nixos/variables-config.nix
-
-    # Choose your theme here
-    # ../../themes/stylix/yoru.nix
+    # ../../nixos/docker.nix
 
+    # You should let those lines as is
     ./hardware-configuration.nix
     ./variables.nix
   ];