Update vector_binary.py

do not use domain mask by default

convlab2/policy/vector/vector_binary.py

@@ -68,7 +68,7 @@ class VectorBinary(VectorBase):
         domain_mask = self.compute_domain_mask(domain_active_dict)
         entity_mask = self.compute_entity_mask(number_entities_dict)
         general_mask = self.compute_general_mask()
-        mask = domain_mask + entity_mask + general_mask
+        mask = entity_mask + general_mask
         return mask
 
     def vectorize_booked(self, state):