message: Remove outbound path unconditionally on drop msg
diff: @@ -113,7 +113,8 @@ void stream_manager::handle(stream_slots slots, upstream_msg::ack_batch& x) {
  void stream_manager::handle(stream_slots slots, upstream_msg::drop&) {
  CAF_LOG_TRACE(CAF_ARG(slots));
  - out().close(slots.receiver);
  + error reason;
  + out().remove_path(slots.receiver, reason, false);
  }
  void stream_manager::handle(stream_slots slots, upstream_msg::forced_drop& x) {
  