zephyrus: don't depend on git-crypt secrets at all

hosts/zephyrus/default.nix

@@ -3,9 +3,6 @@
 # and in the NixOS manual (accessible by running ‘nixos-help’).
 
 { config, lib, pkgs, ... }:
-let
-  secrets = config.my.secrets;
-in
 {
   imports =
     [ # Include the results of the hardware scan.

services/restic-backup.nix

@@ -11,7 +11,6 @@ let
   ;
 
   cfg = config.my.services.restic-backup;
-  secrets = config.my.secrets;
   excludeArg = "--exclude-file=" + (pkgs.writeText "excludes.txt" (concatStringsSep "\n" cfg.exclude));
   makePruneOpts = pruneOpts:
     attrsets.mapAttrsToList (name: value: "--keep-${name} ${toString value}") pruneOpts;

zephyrus.nix

@@ -10,9 +10,6 @@
     # Service definitions
     ./services
 
-    # Configuration secrets
-    ./secrets
-
     # Host-specific config
     ./hosts/zephyrus
   ];