impermanence: remove old workaround

Author: debugloop

modules/nixos/common/impermanence.nix

@@ -3,11 +3,6 @@
     inputs.impermanence.nixosModule
   ];
 
-  # workaround https://github.com/nix-community/impermanence/issues/229
-  # note `systemd.tmpfiles.rules` workaround did not work
-  boot.initrd.systemd.suppressedUnits = ["systemd-machine-id-commit.service"];
-  systemd.suppressedSystemUnits = ["systemd-machine-id-commit.service"];
-
   fileSystems."/" = {
     device = "none";
     fsType = "tmpfs";