nvim: use treesitter folding

users/misterio/home/cli/nvim/default.nix

@@ -16,8 +16,6 @@ in
       set autoread
       au CursorHold,CursorHoldI * checktime
 
-      "Folding
-      set foldmethod=syntax
       "Set fold level to highest in file
       "so everything starts out unfolded at just the right level
       autocmd BufWinEnter * let &foldlevel = max(map(range(1, line('$')), 'foldlevel(v:val)'))

users/misterio/home/cli/nvim/syntax.nix

@@ -1,9 +1,6 @@
 { pkgs, ... }: {
   programs.neovim.plugins = with pkgs.vimPlugins; [
-    {
-      plugin = rust-vim;
-      config = "let g:rust_fold = 1";
-    }
+    rust-vim
     dart-vim-plugin
     plantuml-syntax
     vim-markdown