Can I manage (delete) comments left on a AGOL map/app?

[SteveNelson]

I have a few AGOL mapping applications, and I have some comments that have been left by the public as well as ESRI staff.  I'd like to clear some of these comments from my map.  Can someone tell me if this is possible and if so, how do I do that?
Thanks
Steve

Here's an example - http://tobmaps.maps.arcgis.com/home/item.html?id=94ac98484be44866baa725afe819b9c7

I'd like to remove the comments made by ESRI staff...