There are two ways to delete a course.
In the course go to the details tab.
Then scroll to the bottom and click 'Edit'.
On the next page scroll to the bottom and click 'Delete'.
Go to the 'Burger Menu' at the top and click 'My Events' from the drop down.
In the events page find the event you are looking to delete, click the 'Actions' button drop down arrow followed by 'Delete'.
At the end of both methods a confirmation window will appear asking whether you are sure you want to delete the course, giving Yes and No options.