linux: remove unused features

pkgs/os-specific/linux/kernel/generic.nix

@@ -37,7 +37,7 @@
   modDirVersion ? null
 
 , # An attribute set whose attributes express the availability of
-  # certain features in this kernel.  E.g. `{iwlwifi = true;}'
+  # certain features in this kernel.  E.g. `{ia32Emulation = true;}'
   # indicates a kernel that provides Intel wireless support.  Used in
   # NixOS to implement kernel-specific behaviour.
   features ? {}
@@ -89,9 +89,7 @@ let
 
   # Combine the `features' attribute sets of all the kernel patches.
   kernelFeatures = lib.foldr (x: y: (x.features or {}) // y) ({
-    iwlwifi = true;
     efiBootStub = true;
-    needsCifsUtils = true;
     netfilterRPFilter = true;
     ia32Emulation = true;
   } // features) kernelPatches;