Go to the bottom of the course menu and click the Settings tab. If you click on the settings link on the right side of the page, you will be able to either delete or end the course. If you want to delete a course, click the appropriate button.
If I cannot remove them via the Canvas People tool, how do official enrollments get dropped from my Canvas course during course selection periods?
Contact the student and ask them to remove the course from the schedule/worksheet. Once the student removes the course, their enrollment in the Canvas course will be automatically removed within 2 hours.
SOLUTION: Enrollments cannot be removed from courses after the term ends
When the academic term ends, all courses shift to a read-only state. Once the course is in this state, enrollments cannot be added or removed from the site.