CppProjectUpdater: Remove unread attribute

Change-Id: I51123e5b5609de431cfa6d1558aed0b9739ff9c8
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>

src/plugins/qbsprojectmanager/qbsproject.cpp

@@ -122,7 +122,7 @@ private:
 
 QbsProject::QbsProject(const FileName &fileName) :
     Project(Constants::MIME_TYPE, fileName, [this] { delayParsing(); }),
-    m_cppCodeModelUpdater(new CppTools::CppProjectUpdater(this))
+    m_cppCodeModelUpdater(new CppTools::CppProjectUpdater)
 {
     m_parsingDelay.setInterval(1000); // delay parsing by 1s.