Remove reference/unicode

It references to unicode support which probably won't come
with PHP.NEXT

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@334389 c90b9560-bf6c-de11-be94-00142212c4b1
Fuck, I'm sorry guys

Luckily, it won't require any EN-Revision adjustments AFAIK
Sorry once again...

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@334390 c90b9560-bf6c-de11-be94-00142212c4b1