hierarchy: avoid sbacc()

* spot/tl/hierarchy.cc (is_recurrence): Do not request state-based
acceptance, now that the Rabin->DBA conversionn works on
transition-based acceptance as well.

spot/tl/hierarchy.cc

@@ -41,8 +41,7 @@ namespace spot
       // BA will preserve determinism if possible.
       spot::postprocessor p;
       p.set_type(spot::postprocessor::Generic);
-      p.set_pref(spot::postprocessor::Deterministic
-                 | spot::postprocessor::SBAcc);
+      p.set_pref(spot::postprocessor::Deterministic);
       p.set_level(spot::postprocessor::Low);
       auto dra = p.run(aut);
       if (dra->acc().is_generalized_buchi())