I also would like to second OP’s suggestion, and I’ll shortly try and track down the bug report to up-vote it. (Which will probably require me making another account for a single comment and some contributions. I think that’s 4 I’ve created for OO/LO now. So much for minimizing my online footprint.)
The reason I want to remove the author/date stamp from comments is the same as OP. Clutter.
I use LO for my own personal use. So I have absolutely no need for this information.
It takes up the fist two lines and is in bold. It’s just fugly, and completely misses the point of snappy comments of only a few words.
Where I once had a small comment in an expenses column that said simply:
Mortgage
there is now a massive box that reads:
UNKNOWN AUTHOR, 03/05/2024 13:08
--------
Mortgage
What’s really odd is that I’ve been using LO for a long time now. And the previous version I was using didn’t have this clutter at all. It only changed when I recently updated. Initially I thought the best solution was to simply re-install an earlier version, but some of the bug-fixes etc. might actually be worth having. My point being that as far as I’m concerned, this is not just bug that’s always been there and is complicated to change. It’s a deliberate change that has broken code which previously worked just fine for me.
Edit: I’m referring to Calc. It’s not clear what OP was using. Could it be that this ‘feature’ has always been in Writer, and has recently been merged into Calc? That would explain the way it seems to have been broken.