bdddict: remove register_clone_acc

* src/twa/bdddict.cc, src/twa/bdddict.hh: Here.

src/twa/bdddict.cc

@@ -189,24 +189,6 @@ namespace spot
     register_acceptance_variables(bdd_low(f), for_me);
   }
 
-  int
-  bdd_dict::register_clone_acc(int v, const void* for_me)
-  {
-    assert(unsigned(v) < bdd_map.size());
-    bdd_info& i = bdd_map[v];
-    assert(i.type == acc);
-
-    std::ostringstream s;
-    // FIXME: We could be smarter and reuse unused "$n" numbers.
-    ltl::print_psl(s, i.f) << '$' << ++i.clone_counts;
-    const ltl::formula* f =
-      ltl::atomic_prop::instance(s.str(),
-				 ltl::default_environment::instance());
-    int res = register_acceptance_variable(f, for_me);
-    f->destroy();
-    return res;
-  }
-
   const ltl::formula*
   bdd_dict::oneacc_to_formula(int var) const
   {

src/twa/bdddict.hh

@@ -163,21 +163,6 @@ namespace spot
     }
     /// @}
 
-    /// \brief Clone an acceptance variable VAR for FOR_ME.
-    ///
-    /// This is used in products TGBAs when both operands share the
-    /// same acceptance variables but they need to be distinguished in
-    /// the result.
-    /// @{
-    int register_clone_acc(int var, const void* for_me);
-
-    template <typename T>
-    int register_clone_acc(int var, std::shared_ptr<T> for_me)
-    {
-      return register_clone_acc(var, for_me.get());
-    }
-    /// @}
-
     /// \brief Register BDD variables as acceptance variables.
     ///
     /// Register all variables occurring in \a f as acceptance variables