Normalize :leader/:localleader keybinds

Evil states no longer apply to them. Also removes x-alt-keysym.

modules/lang/nix/config.el

@@ -5,16 +5,16 @@
   :config
   (set-company-backend! 'nix-mode 'company-nixos-options)
 
-  (map! :map nix-mode-map
-        :localleader
-        :n "f" #'nix-update-fetch
-        :n "p" #'nix-format-buffer
-        :n "r" #'nix-repl-show
-        :n "s" #'nix-shell
-        :n "b" #'nix-build
-        :n "u" #'nix-unpack
+  (map! :localleader
+        :map nix-mode-map
+        "f" #'nix-update-fetch
+        "p" #'nix-format-buffer
+        "r" #'nix-repl-show
+        "s" #'nix-shell
+        "b" #'nix-build
+        "u" #'nix-unpack
         (:when (featurep! :completion helm)
-          :n "o" #'helm-nixos-options)))
+          "o" #'helm-nixos-options)))
 
 (def-package! nix-drv-mode
   :mode "\\.drv\\'")