Revert "Work around existing bugs"

There's really no right amount of time to wait for the HMR update. Need to fix the bug

packages/next/src/client/components/router-reducer/fetch-server-response.ts

@@ -193,19 +193,7 @@ export async function fetchServerResponse(
       isNavigation &&
       !process.env.TURBOPACK
     ) {
-      const webpackHMRTimedOut = await Promise.race([
-        waitForWebpackRuntimeHotUpdate().then(() => false),
-        new Promise((resolve) => setTimeout(() => resolve(true), 2000)),
-      ])
-
-      // Work around existing bugs where we receive an HMR update but no message that it was finished.
-      // Having the log before an MPA is pretty bad since it'll just flash the page and then navigate.
-      if (webpackHMRTimedOut) {
-        console.error(
-          'Webpack runtime hot update timed out. Falling back to browser navigation.'
-        )
-        return doMpaNavigation(responseUrl.toString())
-      }
+      await waitForWebpackRuntimeHotUpdate()
     }
 
     // Handle the `fetch` readable stream that can be unwrapped by `React.use`.