Use stable emacs from nixpkgs

modules/editors/emacs.nix

@@ -1,7 +1,5 @@
 { config, lib, pkgs, ... }:
 
-let unstable = import <nixpkgs-unstable> {};
-in
 {
   environment.systemPackages = with pkgs; [
     (lib.mkIf (config.programs.gnupg.agent.enable) pinentry_emacs)
@@ -10,7 +8,7 @@ in
     editorconfig-core-c
     (ripgrep.override {withPCRE2 = true;})
     # Doom Emacs + dependencies
-    unstable.emacs
+    emacs
     sqlite                          # :tools (lookup +docsets)
     texlive.combined.scheme-medium  # :lang org -- for latex previews
     ccls                            # :lang (cc +lsp)