remove unnecessary await when calling findPagesDir (#45807)

## Bug

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- [ ] Integration tests added
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Author: sairajchouhan

packages/next/src/cli/next-dev.ts

@@ -61,7 +61,7 @@ const handleSessionStop = async () => {
       typeof traceGlobals.get('pagesDir') === 'undefined' ||
       typeof traceGlobals.get('appDir') === 'undefined'
     ) {
-      const pagesResult = await findPagesDir(dir, !!config.experimental.appDir)
+      const pagesResult = findPagesDir(dir, !!config.experimental.appDir)
       appDir = !!pagesResult.appDir
       pagesDir = !!pagesResult.pagesDir
     }