Remove PHP4-only extensions

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@334587 c90b9560-bf6c-de11-be94-00142212c4b1
Remove PHP4-only extensions (sigh...)

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@334588 c90b9560-bf6c-de11-be94-00142212c4b1