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.cpp

@@ -32,6 +32,6 @@
 using namespace CppTools;
 
 SemanticInfo::SemanticInfo()
-    : revision(0), hasQ(false), hasD(false), forced(false)
+    : revision(0), forced(false)
 {
 }