Remove SemanticInfo::hasD and SemanticInfo::hasQ. They were used in
CPPEditorWidget::highlightUses() but became superfluous by filtering out
invalid Uses.

Change-Id: I08f46e55cf42fbc6088fbcb03e30822421df57d6
Reviewed-by: hjk <hjk121@nokiamail.com>
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>