There are two different ways to remove your podcast from Listen Notes, choose the one that suits you the best!
You can directly send them an email to firstname.lastname@example.org with your request and the URL of your podcast.
Or you can manually do it, but in order to do so, you must have claimed your podcast on Listen Notes.
If you have, follow these steps:
1. Log into Listennotes.com.
2. Go to your Podcast page.
3. Click on "Manage Podcast" under the Podcaster tab.
4. Scroll down and search for the 'Delete this podcast' section and click the "Request to delate" bottom.