Utils: remove unused variable in SaveFile class

Backup member was never set to true.

Change-Id: I21dc889813820e2a463c5ba812b18b57766e03c4
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>

src/libs/utils/savefile.cpp

@@ -39,7 +39,7 @@ namespace Utils {
 QFile::Permissions SaveFile::m_umask = 0;
 
 SaveFile::SaveFile(const QString &filename) :
-    m_finalFileName(filename), m_finalized(true), m_backup(false)
+    m_finalFileName(filename), m_finalized(true)
 {
 }
 
@@ -128,8 +128,7 @@ bool SaveFile::commit()
         remove();
         return false;
     }
-    if (!m_backup)
-        QFile::remove(bakname);
+    QFile::remove(bakname);
 
     return true;
 }

src/libs/utils/savefile.h

@@ -44,14 +44,11 @@ public:
     void rollback();
     bool commit();
 
-    void setBackup(bool backup) { m_backup = backup; }
-
     static void initializeUmask();
 
 private:
     const QString m_finalFileName;
     bool m_finalized;
-    bool m_backup;
     static QFile::Permissions m_umask;
 };