remove polyglot; not playing nicely with more language-specific packages

nix/home.nix

@@ -157,11 +157,11 @@ in {
     vimAlias = true;
     withPython = true;
     plugins = with pkgs.vimPlugins; [
-      vim-polyglot
       vim-sensible
       vim-startify
       alchemist-vim
       vimtex
+      vim-elixir
       vim-airline
       rainbow
       vim-signify