unused copy constructor removed

cell.cpp

@@ -31,15 +31,6 @@ Cell::Cell(QWidget *parent) : QWidget(parent)
     connect(m_number,SIGNAL(clicked()),this,SLOT(un()));
 }
 
-Cell::Cell(const Cell &old_obj){
-    possibleStates = old_obj.possibleStates;
-    collapsed = old_obj.collapsed;
-    index = old_obj.index;
-
-    m_number = new QPushButton(old_obj.m_number);
-    //m_states = old_obj.m_states;
-    qInfo("aaa");
-}
 void Cell::collapse(int x)
 {
     collapsed = true;

cell.h

@@ -9,7 +9,6 @@ class Cell : public QWidget
     Q_OBJECT
 public:
     explicit Cell(QWidget *parent = 0);
-    Cell (const Cell &old_obj); 
     int possibleStates=9;
     bool collapsed = false;
     std::vector<int> index={0,1,2,3,4,5,6,7,8};