Fix typo in phpdoc. props jamescollins. fixes #25092.
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Remove unused variable. props jeremyfelt. fixes #25121.
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Remove redundant context for Child Themes link. fixes #25079.
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Correct phpdoc for wp-admin/menu.php. props neoxx. fixes #25124.
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Add description for _wp_timezone_choice_usort_callback(). props neoxx. fixes #25125.
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