8335623: Clean up HtmlTag.HtmlTag and make the ARIA role attribute global

[nizarbenalla]

Can I please get a review for this small change? It removes some lines that are no longer necessary and sets the ARIA role as global. Thanks in advance.

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Progress

• [ ] Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• [x] Change must not contain extraneous whitespace
• [x] Commit message must refer to an issue

Issue

• JDK-8335623: Clean up HtmlTag.HtmlTag and make the ARIA role attribute global (Bug - P4)

Reviewers

• Chen Liang (@liach - Committer)

Reviewing

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