This was in the email sent by the Community. Clicking the button yields a blank page, except for the "Comment Not Found The page you were looking for could not be found."
I know you don't like speculation, but I assumed, since I got this e-mail as well, that he deleted his comment.
Looks like it. I didn't even know you can delete a post. I don't really care because I'm too old to be embarrassed.
Basically, ONLY, the likes of, "Moderators" [ ie. 'FamilySearch' "Support" (Personnel) ]; and, "Administrators", in the "Community.FamilySearch" Forum, can, "Delete"/"Remove" a 'Post' (whether, it be theirs; or, another Users/Patrons). And, maybe a few 'Select', of the "Leaders", of some of the 'Groups'. Plus, they ALSO have the ability to "Edit" OTHER Users/Patrons posts.
That Said ...
Us 'lowly' Users/Patrons, CANNOT do such ...
We DO NOT have (nor, are we granted) that 'Level' of ability (nor, the 'Tools', to do so).
It was a Moderator who posted then deleted his comment. I don't know if he is aware that deleting the post does not cancel or retrieve the e-mail that goes out to the person who posted the discussion and everyone that has commented. So they all still see who commented and the first two and a half lines of the post.