WP_HTTP: Revert r30491 which updated the bundled root certificates. There's a report that this is breaking under certain PHP/OpenSSL versions (which we've encountered before), and we're safer with a slighty out of date CA bundle than breaking HTTPS communication on affected sites.
See #30434


git-svn-id: https://develop.svn.wordpress.org/trunk@30765 602fd350-edb4-49c9-b593-d223f7449a82