[bot]: remove unreferenced code

nixos/modules/system/boot/stage-1.nix

@@ -11,7 +11,6 @@ let
 
   udev = config.systemd.package;
 
-  kernelPackages = config.boot.kernelPackages;
   modulesTree = config.system.modulesTree;
   firmware = config.hardware.firmware;
 

nixos/modules/system/boot/stage-2.nix

@@ -4,9 +4,6 @@ with lib;
 
 let
 
-  kernel = config.boot.kernelPackages.kernel;
-  activateConfiguration = config.system.activationScripts.script;
-
   bootStage2 = pkgs.substituteAll {
     src = ./stage-2-init.sh;
     shellDebug = "${pkgs.bashInteractive}/bin/bash";

nixos/modules/system/boot/systemd-nspawn.nix

@@ -6,9 +6,6 @@ with import ./systemd-lib.nix { inherit config lib pkgs; };
 
 let
   cfg = config.systemd.nspawn;
-  assertions = [
-    # boot = true -> processtwo != true
-  ];
 
   checkExec = checkUnitConfig "Exec" [
     (assertOnlyFields [

nixos/modules/system/boot/systemd.nix

@@ -188,8 +188,6 @@ let
       "timers.target"
     ];
 
-  boolToString = value: if value then "yes" else "no";
-
   makeJobScript = name: text:
     let mkScriptName =  s: (replaceChars [ "\\" ] [ "-" ] (shellEscape s) );
         x = pkgs.writeTextFile { name = "unit-script"; executable = true; destination = "/bin/${mkScriptName name}"; inherit text; };