message: Remove unused template parameter
diff: @@ -302,25 +302,25 @@ bool operator!=(const typed_actor<Xs...>& x,
  }
  /// @relates typed_actor
  -template <class... Xs, class... Ys>
  +template <class... Xs>
  bool operator==(const typed_actor<Xs...>& x, std::nullptr_t) noexcept {
  return actor_addr::compare(actor_cast<actor_control_block*>(x), nullptr) == 0;
  }
  /// @relates typed_actor
  -template <class... Xs, class... Ys>
  +template <class... Xs>
  bool operator==(std::nullptr_t, const typed_actor<Xs...>& x) noexcept {
  return actor_addr::compare(actor_cast<actor_control_block*>(x), nullptr) == 0;
  }
  /// @relates typed_actor
  -template <class... Xs, class... Ys>
  +template <class... Xs>
  bool operator!=(const typed_actor<Xs...>& x, std::nullptr_t) noexcept {
  return !(x == nullptr);
  }
  /// @relates typed_actor
  -template <class... Xs, class... Ys>
  +template <class... Xs>
  bool operator!=(std::nullptr_t, const typed_actor<Xs...>& x) noexcept {
  return !(x == nullptr);
  }
  