Deleting a project doesn't remove associated information from civicrm_uf_join table

To duplicate, create a CiviVolunteer project with a profile used for Volunteer Registration. Check that the project was created in the database, and that the associated entry in civicrm_uf_join was also created. I did this using the query:

SELECT civicrm_volunteer_project.id AS project_id, civicrm_volunteer_project.title AS project_title, civicrm_uf_join.id AS uf_join_id, civicrm_uf_join.entity_id AS uf_join_project_id, civicrm_uf_join.uf_group_id AS uf_join_profile
 FROM civicrm_uf_join
 LEFT JOIN civicrm_volunteer_project ON civicrm_uf_join.entity_id = civicrm_volunteer_project.id
 WHERE civicrm_uf_join.entity_id = ###;

Next, go back to the GUI and search for your test project in Manage Volunteer Projects. Select it by clicking the checkbox to the left of the project, then delete it using the Bulk Actions dropdown and clicking Run. Once the project is removed, go back and re-run that query and you'll see that the entry in the civicrm_uf_join table was not removed.