C++: Slim down SemanticInfo

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>

src/plugins/cpptools/cppsemanticinfo.h

@@ -62,8 +62,6 @@ public:
     SemanticInfo();
 
     unsigned revision;
-    bool hasQ: 1;
-    bool hasD: 1;
     bool forced: 1;
     CPlusPlus::Snapshot snapshot;
     CPlusPlus::Document::Ptr doc;