remove nixpkgs config in homemanager (deprecated)

nix/home/default.nix

@@ -12,7 +12,6 @@
 
     news.display = "silent";
     fonts.fontconfig.enable = true;
-    nixpkgs.config.allowUnfree = true;
 
     home.packages = with pkgs; [
       # nix

nix/programs/gpg/default.nix

@@ -4,6 +4,7 @@ let
 
   keysDir = ../../../files/keys;
   keys = lib.attrsets.mapAttrsToList (name: type: "${keysDir}/${name}") (builtins.readDir keysDir);
+  gpgKeys = builtins.filter (path: lib.strings.hasSuffix "asc" path) keys;
 
 in
 {
@@ -12,7 +13,7 @@ in
     # install keys into gpg keyring
     programs.gpg = {
       enable = true;
-      publicKeys = map (file: { source = file; trust = 5; }) keys;
+      publicKeys = map (path: { source = path; trust = 5; }) gpgKeys;
     };
 
     # global gpg agent