Remove unused CSSSelector(QualifiedName) constructor.
<http://webkit.org/b/106652>

Reviewed by Antti Koivisto.

* css/CSSSelector.h:
(CSSSelector):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@139432 268f45cc-cd09-0410-ab3c-d52691b4dbfc