cleanup some vim configs, highlight long parts of lines

nix/home/programs/nvim/default.nix

@@ -1,15 +1,5 @@
 { pkgs, ... }:
 let
-  vim-goyo = pkgs.vimUtils.buildVimPlugin {
-    name = "vim-goyo";
-    src = pkgs.fetchFromGitHub {
-      owner = "junegunn";
-      repo = "goyo.vim";
-      rev = "6b6ed2734084fdbb6315357ddcaecf9c8e6f143d";
-      sha256 = "1ywlz1hn54kxyp5q0angriaarimq7ys7m6sk6l4x8jr1g2yh0afz";
-    };
-  };
-
   vim-nix = pkgs.vimUtils.buildVimPlugin {
     name = "vim-nix";
     src = pkgs.fetchFromGitHub {
@@ -74,7 +64,6 @@ with builtins;
       vim-javascript
       vim-json
       vim-jsx-pretty
-      vim-prisma
 
       vim-commentary
       vim-airline
@@ -125,9 +114,25 @@ with builtins;
           EOF
         '';
       }
-      undotree
-      vim-goyo
-      luasnip
+      {
+        plugin = undotree;
+        config = ''
+          nnoremap <leader>u :UndotreeToggle<CR>
+          let g:undotree_SetFocusWhenToggle = 1
+          if has("persistent_undo")
+             let target_path = expand('~/.undodir')
+
+              " create the directory and any parent directories
+              " if the location does not exist.
+              if !isdirectory(target_path)
+                  call mkdir(target_path, "p", 0700)
+              endif
+
+              let &undodir=target_path
+              set undofile
+          endif
+        '';
+      }
       cmp-nvim-lsp
       {
         plugin = nvim-lspconfig;