[XQuery] IBM-XQ-010: Bug in computed constructors

(IBM-XQ-010) Section 3.7.3.1 (Computed Element Constructors): Content 
Expression Rule 3 explains what to do if the content sequence contains a 
namespace node. But this is impossible because XQuery does not support the 
namespace axis. This rule (and error XQ0040 which it references) should be 
deleted. For the same reason, namespace nodes should be deleted from Rule 
2 in Section 3.7.3.3 (Document Node Constructors).

--Don Chamberlin