That is an excellent question, Michelle!
Currently, there isn't a way for an Instructor to do this in the WileyPLUS (next generation) platform; however, Technical Support can--please email Technical Support (firstname.lastname@example.org) with your course information and the student's information (name & email address) that you wish removed from the course.
We recommend that you export the gradebook before making this request, as once this student is removed their work will be lost and if it turns out that they need back into the course, you will want their grades to manually put back in.
Thanks for reaching out!
Tom with Wiley