remove unused items according to the linter

middleware/notFound.tsx

@@ -1,6 +1,6 @@
 // Copyright 2021 the Deno authors. All rights reserved. MIT license.
 /** @jsx h */
-import { getStyleTag, h, Helmet, renderSSR, Status, tw } from "../deps.ts";
+import { getStyleTag, h, Helmet, renderSSR, Status } from "../deps.ts";
 import type { Middleware } from "../deps.ts";
 import { sheet } from "../shared.ts";
 import { getBody } from "../util.ts";

routes/doc.tsx

@@ -46,16 +46,6 @@ function isPackageHost(host: string): boolean {
   return host.toLowerCase() === "deno.land";
 }
 
-/**
- * Return `true` if the index structure has "children" entries that can be
- * displayed as an index, otherwise `false`.
- */
-function hasSubEntries(indexStructure: IndexStructure, path: string): boolean {
-  return [...indexStructure.entries.keys()].some((key) =>
-    key.startsWith(path) && key !== path
-  );
-}
-
 export const packageGetHead: RouterMiddleware<DocRoutes> = (ctx, next) => {
   let { host, item, path } = ctx.params;
   let { search } = ctx.request.url;