Delete All: Remove all cards in a column
Tired of deleting tasks one by one? The Delete All script makes it easy!
It adds a Delete all option to your column’s context menu—just right-click an empty space within a column to access it.

How to apply it?
To use the Delete All script, go to board Settings → Power-Ups → Developer Tools and paste the following link to the Enter links to the selected scripts area, then confirm by clicking the Save changes button.
Be sure to use this functionality with care—while removed tasks can be recovered for a limited time, only account admins and owners have access to this action.
For best results, we recommend archiving completed tasks instead of deleting them.