Revert "misc: shortcut styled-jsx in external resolution (#56291)" (#…

…56334)

We can't resolve the exact URL in externals otherwise when you move from
one path to another.

x-ref: [slack
thread](https://vercel.slack.com/archives/C04KC8A53T7/p1696291412072799?thread_ts=1695906014.899719&cid=C04KC8A53T7)

This reverts commit dba978f.

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packages/next/src/build/handle-externals.ts

@@ -301,8 +301,10 @@ export function makeExternalHandler({
       return resolveResult.localRes
     }
 
-    if (request === 'styled-jsx/style' && !isAppLayer) {
-      return `commonjs ${defaultOverrides['styled-jsx/style']}`
+    // Forcedly resolve the styled-jsx installed by next.js,
+    // since `resolveExternal` cannot find the styled-jsx dep with pnpm
+    if (request === 'styled-jsx/style') {
+      resolveResult.res = defaultOverrides['styled-jsx/style']
     }
 
     const { res, isEsm } = resolveResult