Remove unused Nix lambda patterns (deadnix cleanup)

.beads/.local_version

@@ -1 +1 @@
-0.43.0
+0.44.0

.beads/last-touched

@@ -1 +1 @@
-ops-jrz1-t73
+ops-jrz1-6ip

configuration.nix

@@ -1,4 +1,4 @@
-{ config, pkgs, pkgs-unstable, beads, opencode, ... }:
+{ pkgs, pkgs-unstable, beads, opencode, ... }:
 
 let
   # ==========================================================================

flake.nix

@@ -24,7 +24,6 @@
   outputs = { self, nixpkgs, nixpkgs-unstable, sops-nix, ... }@inputs:
   let
     system = "x86_64-linux";
-    pkgs = nixpkgs.legacyPackages.${system};
   in {
     # Pre-deploy checks: nix flake check
     checks.${system} = {

hardware-configuration.nix

@@ -1,7 +1,7 @@
 # Do not modify this file!  It was generated by 'nixos-generate-config'
 # and may be overwritten by future invocations.  Please make changes
 # to /etc/nixos/configuration.nix instead.
-{ config, lib, pkgs, modulesPath, ... }:
+{ lib, ... }:
 
 {
   imports = [ ];

hosts/ops-jrz1-vm.nix

@@ -1,6 +1,6 @@
 # VM testing configuration for ops-jrz1
 # This configuration allows testing without real secrets
-{ config, pkgs, pkgs-unstable, lib, ... }:
+{ lib, ... }:
 
 {
   # Disable built-in NixOS maubot module to use our sops-nix enhanced version

hosts/ops-jrz1.nix

@@ -1,4 +1,4 @@
-{ config, pkgs, pkgs-unstable, ... }:
+{ pkgs, ... }:
 
 {
   # ops-jrz1 production VPS configuration

modules/dev-services.nix

@@ -1,5 +1,5 @@
 # Development services module - Matrix, Forgejo, and Slack bridge
-{ config, pkgs, pkgs-unstable, lib, ... }:
+{ config, pkgs-unstable, lib, ... }:
 
 with lib;
 

modules/mautrix-slack.nix

@@ -9,8 +9,6 @@ let
   cfg = config.services.mautrix-slack;
   yamlFormat = pkgs.formats.yaml { };
 
-  exampleConfigPath = "${cfg.package}/example-config.yaml";
-
   configOverrides = {
     homeserver = {
       address = cfg.matrix.homeserverUrl;