[clone-repo] Unable to reset exercise once completed

[SAN-MUYUN]

When users attempt to reset the exercise after creating the shapes folder, the folder itself is not deleted. As a result, students cannot reset the exercise if they have completed this exercise.

To replicate this issue:

1. Follow the instructions and complete the exercise, run gitmastery verify to check that exercise is completed
2. navigate back to clone-repo folder, run gitmastery progress reset to reset the progress of this exercise
3. run gitmastery verify again, in the same folder
   expected behavior: exercise marked as incomplete, folder is reset.
   actual behavior: exercise is still marked as completed.