delete useless code

src/maat_ex_data.c

@@ -286,4 +286,4 @@ size_t ex_data_runtime_list_ex_container(struct ex_data_runtime *ex_data_rt,
                                          struct ex_container ***ex_container)
 {
     return rcu_hash_list(ex_data_rt->htable, (void ***)ex_container);
-}
+}