message: Remove code which potentially causes a use-after-free on BivariateMap copy
diff: @@ -133,23 +133,6 @@ public:
  , m_managesBSet(false)
  { }
  - ~BivariateMap()
  - {
  - if(m_managesBSet && m_bset != nullptr)
  - {
  - delete m_bset;
  - m_bset = nullptr;
  - }
  - }
  -
  - /**
  - * \brief Sets flag to indicate if instance manages its bivariate set pointer
  - *
  - * By default, a BivariateMap does not manage the memory associated with
  - * its BivariateSet.
  - */
  - void setManagesBSetPtr(bool flag) { m_managesBSet = flag; }
  -
  // (KW) Problem -- does not work with RelationSet
  template <typename BivariateSetRetType, typename RelType = void>
  typename std::enable_if<!traits::has_relation_ptr<BivariateSetRetType>::value,
  