rm inconsequential setParent call

GUI/View/Canvas/ProjectionsEditorCanvas.cpp

@@ -103,8 +103,6 @@ void ProjectionsEditorCanvas::onEnteringColorMap()
 
     if (m_liveProjection) {
         m_liveProjection->setIsVisible(false);
-        m_liveProjection->setParent(this);
-
         emit m_data2DItem->projectionPositionChanged(m_liveProjection.get());
     }
 }