Remove dup line of code in "Working with local content in WebView2 apps"

[mikehoffms]

Rendered article section for review:

• Working with local content in WebView2 apps > Example of handling the WebResourceRequested event - removes dup line wil::com_ptr<IStream> stream;
  • https://review.learn.microsoft.com/microsoft-edge/webview2/concepts/working-with-local-content?branch=pr-en-us-3208&tabs=win32cpp#example-of-handling-the-webresourcerequested-event
  • Before/Live

AB#51968489

[learn-build-service-prod]

Learn Build status updates of commit 93cf183:

✅ Validation status: passed

File	Status	Preview URL	Details
microsoft-edge/webview2/concepts/working-with-local-content.md	✅Succeeded	View

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