In the classic content experience, it was possible to delete all content in a course by going to the Table of Contents, clicking the disclosure triangle, and selecting "Delete All Modules".
Through searching, I could not find a way to perform the same action in the New Content Experience. The best I could find is going to each individual module, clicking the "…" button, and selecting "Delete".
Does anyone know of a way to "Delete All" when in the New Content Experience?