Delete imports using the REST API

Is it possible to delete an import in a group using the REST API? The documentation only has delete endpoints for reports and datasets, but not whole imports.

The Get Imports endpoints still lists the empty import after removing the report, so the group ends up with garbage imports.

This used to be possible for the old workspace collections, but DELETE seems to be unsupported for the import endpoint (

The requested resource does not support http method 'DELETE'

Thanks in advance!