Ah. I'm not a miner and didn't realize that was the significance. In any case, it's just one post that was deleted. If it's that important to the community, just make the post again, maybe make it a little more substantial. We all get posts deleted every now and then, and it's not a huge deal.
Apparently more than a post were deleted, in fact, multiple post from multiple people were deleted.
You did notice that the post was about a block, found by the pool, being confirmed and celebrated.
So on topic, not spam, and not breaking the posting rules.
If it was mistake, then it would be appropriate to own up to it, which would also put the issue to rest, yes?
I know it was on topic and it doesn't really break the posting rules, but you don't really know if you broke it or not. Like I said, just because topics are on-topic, doesn't mean they can't be deleted.