chore: fix ESLint warnings

Author: MichaelDeBoey

packages/react-router-dom/__tests__/data-browser-router-test.tsx

@@ -5466,14 +5466,3 @@ function getHtml(container: HTMLElement) {
     },
   });
 }
-
-async function waitForRouterInitialize(router) {
-  return await new Promise((resolve) => {
-    let unsubscribe = router.subscribe((updatedState) => {
-      if (updatedState.initialized) {
-        unsubscribe();
-        resolve(router);
-      }
-    });
-  });
-}

packages/react-router-dom/server.tsx

@@ -6,7 +6,6 @@ import type {
   StaticHandlerContext,
   CreateStaticHandlerOptions as RouterCreateStaticHandlerOptions,
   UNSAFE_RouteManifest as RouteManifest,
-  FutureConfig,
 } from "@remix-run/router";
 import {
   IDLE_BLOCKER,