remove dead code (run deadnix)

tests/tftpboot/configuration.nix

@@ -1,6 +1,6 @@
 { config, pkgs, lib, lim, ... } :
 let
-  inherit (pkgs.pseudofile) dir symlink;
+  inherit (pkgs.pseudofile) dir;
   dts = pkgs.runCommand "qemu.dts" {
     nativeBuildInputs = with pkgs.pkgsBuildBuild; [ dtc qemu ];
   } ''

tests/tftpboot/test.nix

@@ -4,7 +4,7 @@
 let check = deviceName  : config :
 let derivation = (import liminix {
       device = import "${liminix}/devices/${deviceName}/";
-      liminix-config = { pkgs, ... } : {
+      liminix-config = { ... } : {
         imports = [./configuration.nix];
         inherit config;
       };