Select the project name, click on the "Chapter" menu and select "View/edit chapter":
Click on the chapter where the comment appears.
Click on the "Chapter" menu and choose "Delete comment":
Note that this does not include version comments –comments that are added when uploading a chapter.
Select the comment(s) and click "Delete"
Note that you can only delete comments that have been marked as "Done" or "No action taken". To change the status of a comment, log in as a user and update the drop-down menu as seen below.
After clicking "Delete" you will be asked to confirm.