Deleting drafts and abilities in Hopscotch is the same way you delete apps on your iPad. Here's how you do it:
1) Press and hold down on the draft/ability until options pop up.
Here are three photos, one for deleting drafts and two for abilities.
New for abilities:
(Old) for abilities:
2) Tap on the "X" button in the top-left corner for drafts.
3) A screen will pop up asking you to make sure you want to delete the ability or draft. Once you are sure, tap "Delete".
And poof it's gone! That's how you delete abilities and drafts