How do I delete a comment/reply in Commons?
You must possess delete permissions in the Commons tool in order to delete a comment/reply. Deleting a comment/reply is a permanent action.
Go to the Commons tool.
Select the Commons tool from the Tool Menu of your site.
Click Delete.
Locate the comment/reply that you would like to delete and click its associated Delete option.
Confirm deletion.
Click OK to confirm permanent deletion of the comment/reply.