Why
 

Why were thread deletion things removed?

This was a terrible idea.

Doesn't look like it to me.

I've lost them too =(

I still see them. Napo removed a post of his own.

But the mod actions do not show.

I don't see anything

I doubt that they were "removed". More likely they started using permanent delete.

Because it never happened ;)

I think he means 'threads', not posts.

I see those too.

But as said before, it's probably a change in the ways mods are deleting stuff.

I'm not doing anything different then I was before.

If he's just talking about Wind Master's thread, then that might have just been moved.

Yeah. There are two kinds of delete; hard delete and soft delete. Hard delete effectively vaporizes a thread from existence (to the point where not even mods can see it as previously existing) and soft delete (where everyone can see the notice of the deleted thread and reason as to why it's deleted).

I can't see any of those. Nor post deletions