В течение 24 часов...
https://docs.moodle.org/35/en/Course_creator_role#Deleting_a_course
Deleting a course
Course creators can delete courses they have made (for 24 hours from the creation, hardcoded hack in Moodle code you cannot prevent this prohibiting moodle/course:delete) from the UI. This can be done by accessing administration-block -> site administration -> courses -> Manage courses and categories and by clicking the delete-button on the course-row.
https://docs.moodle.org/35/en/Course_creator_role#Deleting_a_course
Deleting a course
Course creators can delete courses they have made (for 24 hours from the creation, hardcoded hack in Moodle code you cannot prevent this prohibiting moodle/course:delete) from the UI. This can be done by accessing administration-block -> site administration -> courses -> Manage courses and categories and by clicking the delete-button on the course-row.