Removed depreciated Database queries.

I believe this issue has been resolved with merge requests on issue #3072720.
https://www.drupal.org/project/nodeorder/issues/3072720#comment-14981147 📌 Drupal 9 Deprecated Code Report for Node Order Needs review

Drupal 9 Compatible: 8.x-1.x-dev
Drupal 10 Compatible: 2.0.0

If something necessary was missed, please let me know.

Automatically closed - issue fixed for 2 weeks with no activity.