Remove redundant microcode config

nixos/configuration.nix

@@ -66,11 +66,11 @@
   security.protectKernelImage = true;
 
   hardware = {
-    cpu.intel.updateMicrocode = true;
+    # cpu.intel.updateMicrocode = true; # Already defined in hardware.nix
 
     # Use all redistributable firmware (i.e. nonfree)
     enableAllFirmware = true;
-    enableRedistributableFirmware = true;
+    enableRedistributableFirmware = true; # Also enables microcode update
 
     nvidia.modesetting.enable = true; # Not officially supported by NVidia but needed for wayland
     opengl.enable = true;