Remove unused signal "isBroke()"

Libs/Visualization/VTK/Core/ctkVTKConnection.cpp

@@ -156,13 +156,6 @@ void ctkVTKConnectionPrivate::disconnect()
     this->VTKObject->RemoveObservers(vtkCommand::DeleteEvent, this->Callback);
     }
 
-  if (this->ObserveDeletion && this->QtObject)
-    {
-    //this->VTKObject->AddObserver(vtkCommand::DeleteEvent, this->Callback); has already been removed
-    QObject::disconnect(this->QtObject, SIGNAL(destroyed(QObject*)),
-                        q, SIGNAL(isBroke()));
-    }
-
   this->Connected = false;
 }
 
@@ -450,7 +443,6 @@ void ctkVTKConnection::vtkObjectDeleted()
   Q_D(ctkVTKConnection);
   d->VTKObject = 0;
   d->disconnect();
-  emit isBroke();
 }
 
 //-----------------------------------------------------------------------------
@@ -459,7 +451,6 @@ void ctkVTKConnection::qobjectDeleted()
   Q_D(ctkVTKConnection);
   d->QtObject = 0;
   d->disconnect();
-  emit isBroke();
 }
 
 //-----------------------------------------------------------------------------

Libs/Visualization/VTK/Core/ctkVTKConnection.h

@@ -104,11 +104,6 @@ Q_SIGNALS:
   /// connect(obj1,SIGNAL(signalFunc(A,B,C,D)),obj2,SLOT(slotFunc(A)));
   void emitExecute(vtkObject* caller, void* call_data, unsigned long vtk_event, void* client_data);
 
-  /// The signal is fired when the observed vtk object or the receiving qt 
-  /// object is deleted. It can conveniently connected to the deleteLater 
-  /// slot
-  void isBroke();
-
 protected Q_SLOTS:
   void vtkObjectDeleted();
   void qobjectDeleted();