There is no way to delete a custom field in Settings. However, a custom field will only appear in your listing if you enable it. You have to disable it.
- Go to "Listings" (in Listing Management). Use the filters to view listings by Class Name, Tag Name, Listing Type, or Min Date/Max Date. You can use multiple filters to make the job even easier.
- Navigate to the listing that you wish to edit. Click on "View Listing" (eye icon).
- In the Listing Info tab, go to "Advanced Settings". Click on the pencil icon to open.
- Scroll down to your custom booking fields. Toggle the custom field that you wish to disable.
- Save your changes.