You can hide a Reviewer's comments made on a lesson or unit.
To do this, open the lesson or unit. Towards the top left of your lesson or unit, below the lesson or unit title, uncheck the 'Show General Comments' and 'Show Line-Item Comments' boxes to remove the comments from this view of your Lesson or Unit.
Please note that this will not delete the comments. You can check these boxes again at a later date, to view the comments again.
Please also note that the comments do not appear in the print view of your lesson or unit.