QbsProject: Remove unread attribute

Also remove the signal CppProjectUpdater::projectInfoUpdated() which is
now unused.

Change-Id: I65afe8f96cd8175edaf8ccb6e5067e4f9cd8d99f
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>

src/plugins/cpptools/cppprojectupdater.cpp

@@ -100,10 +100,6 @@ void CppProjectUpdater::onProjectInfoGenerated()
     QFuture<void> future = CppModelManager::instance()
             ->updateProjectInfo(m_futureInterface, m_generateFutureWatcher.result());
     QTC_CHECK(future != QFuture<void>());
-
-    const ProjectInfo projectInfo = CppModelManager::instance()->projectInfo(m_project);
-    QTC_CHECK(projectInfo.isValid());
-    emit projectInfoUpdated(projectInfo);
 }
 
 } // namespace CppTools

src/plugins/cpptools/cppprojectupdater.h

@@ -49,9 +49,6 @@ public:
     void update(const ProjectUpdateInfo &projectUpdateInfo);
     void cancel();
 
-signals:
-    void projectInfoUpdated(const ProjectInfo &projectInfo);
-
 private:
     void cancelAndWaitForFinished();