Docs: remove leftover announcement banner

[dreamorosi]

What were you searching in the docs?

Nothing specific, but when opening the docs there's an empty black banner at the top that shifts the content a few pixels down.

Is this related to an existing documentation section?

No response

How can we improve?

Remove the announcement banner when there's no announcement.

Got a suggestion in mind?

No response

Acknowledgment

• I understand the final update might be different from my proposed suggestion, or refused.

[github-actions]

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[github-actions]

This is now released under 2.34.0 version!