Fix: Removed unwanted commented HTML code for Edit timestamp checkbox on edit comment screen.

[umeshnevase]

This code is not required as commented and in Todo list. We should have remove unwanted HTML from core.

Trac ticket: https://core.trac.wordpress.org/ticket/63476

[github-actions]

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Props umeshnevase.

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[github-actions]

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[github-actions]

A commit was made that fixes the Trac ticket referenced in the description of this pull request.

SVN changeset: 60252
GitHub commit: 2295d8a

This PR will be closed, but please confirm the accuracy of this and reopen if there is more work to be done.