Assignments, Classes, and Grades can all be removed by swiping left on the cell on their respective page.
To remove a class:
From the Classes page, swipe left from the far right side and choose the red Remove Class option
Confirm the deletion of the class by tapping Yes
Removing a class will not delete the associated to-do assignments as these are not dependent on the class being active.
🌟 Deleting a class does effect the free tier class limit