polyfill: remove boot.{enableContainers,bcache}

hosts/common/polyunfill.nix

@@ -144,6 +144,10 @@ in
     # it was enabled by default before 23.11
     boot.swraid.enable = lib.mkDefault false;
 
+    # see: <nixos/modules/tasks/bcache.nix>
+    # these allow you to use the Linux block cache (cool! doesn't need to be a default though)
+    boot.bcache.enable = lib.mkDefault false;
+
     # see: <nixos/modules/system/boot/kernel.nix>
     # by default, it adds to boot.initrd.availableKernelModules:
     # - SATA: "ahci" "sata_nv" "sata_via" "sata_sis" "sata_uli" "ata_piix" "pata_marvell"
@@ -155,5 +159,8 @@ in
     # - on x86 only: more keyboard stuff: "pcips2" "atkbd" "i8042"
 
     boot.initrd.includeDefaultModules = lib.mkDefault false;
+
+    # see: <repo:nixos/nixpkgs:nixos/modules/virtualisation/nixos-containers.nix>
+    boot.enableContainers = lib.mkDefault false;
   };
 }