Project: Do not save filenames in derived classes

Change-Id: I23960c61676e96c429b59ad8f8247e1b88606b1a
Reviewed-by: Niels Weber <niels.weber@theqtcompany.com>
Reviewed-by: Tobias Hunger <tobias.hunger@theqtcompany.com>

src/plugins/genericprojectmanager/genericproject.h

@@ -96,7 +96,6 @@ private:
 
     void refreshCppCodeModel();
 
-    QString m_fileName;
     QString m_filesFileName;
     QString m_includesFileName;
     QString m_configFileName;