neovim: Revert conditional fcitx import

This actually had the side effect of not including fcitx-vim in all
cases.

home/neovim.nix

@@ -1,4 +1,4 @@
-{ pkgs, lib, config, ... }:
+{ pkgs, config, ... }:
 let
   vim-nix-rummik = pkgs.vimUtils.buildVimPluginFrom2Nix {
     pname = "vim-nix";
@@ -349,7 +349,7 @@ in
       bufdelete-nvim
       vim-crystal
       vim-nix-rummik
-      (lib.mkIf (config.i18n.inputMethod.enabled == "fcitx5") fcitx-vim)
+      fcitx-vim
     ];
   };