neovim: Remove vim-nix

Most of its functionalty is now provided by tree-sitter. Also, it
somehow causes errors for vimtex‽

pkgs/default.nix

@@ -64,28 +64,4 @@ in
 
     patches = [ ];
   });
-
-  vimPlugins = prev.vimPlugins // {
-    # TODO: Remove once (if?) https://github.com/LnL7/vim-nix/pull/28 lands
-    vim-nix = prev.vimPlugins.vim-nix.overrideAttrs (o: {
-      patches = o.patches or [ ] ++ (map prev.fetchpatch [
-        {
-          url = "https://github.com/LnL7/vim-nix/commit/d298418ba10e1460b3b22106633731c2a9c1c83b.patch";
-          sha256 = "sha256-JcSkHScZtEN7qLYKxQB3pasl98MBXVBilB1noLxJxb8=";
-        }
-        {
-          url = "https://github.com/LnL7/vim-nix/commit/7b26edee3e2f63cce096aff65cfdaf995ebd92b0.patch";
-          sha256 = "sha256-sId/HOUfYf5U9S3HgSmOsldRiEbXc5mVFol7M7CMdi8=";
-        }
-        {
-          url = "https://github.com/LnL7/vim-nix/commit/7cad7f3666a63ff00f7ecd73a98886031901b918.patch";
-          sha256 = "sha256-rSRPkCo1wLvyufQkOo3gOwHetxvLdI6L89r7UgApz54=";
-        }
-        {
-          url = "https://github.com/LnL7/vim-nix/commit/6affa2b211b02a907ab3bc7064821be57ae93446.patch";
-          sha256 = "sha256-/fFx2/v2bGLAf5xQD+Y5p79NyRQu2dRFNoc9sYXoglM=";
-        }
-      ]);
-    });
-  };
 }

users/simon/modules/neovim/default.nix

@@ -95,7 +95,6 @@ in
       vim-fugitive
       vim-illuminate
       vim-markdown
-      vim-nix
       vim-openscad
       vim-snippets
       vimtex