Swagger Backend Delete Course by PSID and Enroll Code

[kmflippo]

1. In courses controller, add an additional delete
2. Discover id of the courses row using input ex. look at id 0, if the psid and enroll code are correct, id 0 is our id to delete. Otherwise go to id 1 and check that
3. Emulate the current delete to make sure that connected courses (sections and lectures) are deleted