Eliminate the use of `extract()` in `get_pages()`.

See #22400.

Built from https://develop.svn.wordpress.org/trunk@28471


git-svn-id: http://core.svn.wordpress.org/trunk@28298 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Eliminate the use of `extract()` in `MO::import_from_reader()`.

See #22400.

Built from https://develop.svn.wordpress.org/trunk@28472


git-svn-id: http://core.svn.wordpress.org/trunk@28299 1a063a9b-81f0-0310-95a4-ce76da25c4cd