remove playground annotations from BatchElementsExample

[aIbrahiim]

Remove beam playground metadata from BatchElementsExample because Playground CI nightly compiles examples against the latest released Beam SDK, which does not yet include BatchElements

Will Readd the annotations after the next release.

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[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request temporarily removes metadata annotations from the BatchElementsExample file. This change is necessary because the current Beam Playground CI environment uses a version of the SDK that does not yet support the BatchElements transform, causing build failures. The annotations are intended to be restored once the SDK is updated in the next release.

Highlights

• Beam Playground Metadata Removal: Removed the Beam Playground annotations from the BatchElementsExample class to prevent CI compilation errors.

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[gemini-code-assist]

Code Review

This pull request removes the beam-playground metadata comment block from the BatchElementsExample.java file. There are no review comments, and I have no feedback to provide.

[aIbrahiim]

cc: @damccorm @Abacn