yubikey-agent: replace overlay with nixos-unstable

Don't use the overlay anymore, because now there's a recent enough
version in nixpkgs branch nixos-unstable

overlays/yubikey-agent.nix

@@ -1,18 +0,0 @@
-final: prev: {
-  yubikey-agent-master =
-    let
-      version = "unstable-2022-03-17";
-      src = prev.fetchFromGitHub {
-        owner = "FiloSottile";
-        repo = "yubikey-agent";
-        rev = "205a7ef2554625c7494038600d963123d6311873";
-        sha256 = "sha256-wJpN63KY5scmez6yYFsIr3JLEUB+YSl/XvoatIIeRI0=";
-      };
-    in
-    (prev.yubikey-agent.override rec {
-      buildGoModule = args: prev.buildGoModule.override { go = prev.go_1_17; } (args // {
-        inherit src version;
-        vendorSha256 = "sha256-SnjbkDPVjAnCbM2nLqBsuaPZwOmvDTKiUbi/93BlWVQ=";
-      });
-    });
-}

users/teutat3s/home.nix

@@ -1,4 +1,4 @@
-{ config, home-manager, inputs, lib, pkgs, ... }:
+{ config, home-manager, inputs, lib, pkgs, latestModulesPath, ... }:
 with lib;
 let
   psCfg = config.pub-solar;
@@ -9,6 +9,10 @@ in
 {
   imports = [
     ./session-variables.nix
+    "${latestModulesPath}/services/security/yubikey-agent.nix"
+  ];
+  disabledModules = [
+    "services/security/yubikey-agent.nix"
   ];
 
   config = {
@@ -40,40 +44,10 @@ in
         vault
         veracrypt
         waypoint
-        yubikey-agent-master
+        yubikey-agent
         nix-autobahn.packages.${pkgs.system}.nix-autobahn
       ];
 
-
-      systemd.user.services.yubikey-agent = {
-        Unit = {
-          Description = "Seamless ssh-agent for YubiKeys";
-          Documentation = [ "https://filippo.io/yubikey-agent" ];
-        };
-
-        Service = {
-          ExecStart = "${pkgs.yubikey-agent-master}/bin/yubikey-agent -l %t/yubikey-agent/yubikey-agent.sock";
-          ExecReload = "/bin/kill -HUP $MAINPID";
-          IPAddressDeny = "any";
-          RestrictAddressFamilies = "AF_UNIX";
-          RestrictNamespaces = "yes";
-          RestrictRealtime = "yes";
-          RestrictSUIDSGID = "yes";
-          LockPersonality = "yes";
-          SystemCallFilter = "@system-service ~@privileged @resources";
-          SystemCallErrorNumber = "EPERM";
-          SystemCallArchitectures = "native";
-          NoNewPrivileges = "yes";
-          KeyringMode = "private";
-          UMask = "0177";
-          RuntimeDirectory = "yubikey-agent";
-        };
-
-        Install = {
-          WantedBy = [ "sway-session.target" ];
-        };
-      };
-
       programs.zsh = {
         initExtra = import ./zshrc.nix { inherit config pkgs tritonshell; };
       };