Qt4ProjectBuildConfiguration: Fix QML debug checkbox

Task-number: QTCREATORBUG-7682

Change-Id: Icdd20c48724b09d687095745b8106dec3357a814
Reviewed-by: Tobias Hunger <tobias.hunger@nokia.com>

src/plugins/qt4projectmanager/qt4buildconfiguration.cpp

@@ -143,7 +143,6 @@ void Qt4BuildConfiguration::ctor()
 
 void Qt4BuildConfiguration::profileChanged()
 {
-    // emit qtVersionChanged(); TODO what was connected to that
     emit requestBuildSystemEvaluation();
     emit environmentChanged();
     emitBuildDirectoryChanged();