treewide: drop 23.11 compat code

asus/zephyrus/ga402x/shared.nix

@@ -1,6 +1,5 @@
 {
   config,
-  pkgs,
   lib,
   ...
 }:
@@ -11,9 +10,7 @@ let
     mkEnableOption
     mkIf
     mkMerge
-    version
     versionAtLeast
-    versionOlder
     ;
 
   cfg = config.hardware.asus.zephyrus.ga402x;
@@ -94,12 +91,6 @@ in
       '';
     })
 
-    (mkIf (versionOlder version "23.11") {
-      # See https://asus-linux.org/wiki/nixos/ for info about some problems
-      # detecting the dGPU:
-      systemd.services.supergfxd.path = [ pkgs.pciutils ];
-    })
-
     (mkIf (config.networking.wireless.iwd.enable && config.networking.wireless.scanOnLowSignal) {
       # Meditek doesn't seem to be quite sensitive enough on the default roaming settings:
       #   https://wiki.archlinux.org/title/Wpa_supplicant#Roaming

gpd/pocket-3/default.nix

@@ -22,12 +22,7 @@ in
   boot.initrd.kernelModules = [ "i915" ]; # Early loading so the passphrase prompt appears on external displays
   hardware.graphics.extraPackages = with pkgs; [
     intel-media-driver
-    (
-      if (lib.versionOlder (lib.versions.majorMinor lib.version) "23.11") then
-        vaapiIntel
-      else
-        intel-vaapi-driver
-    )
+    intel-vaapi-driver
   ];
 
   boot.kernelParams = [