It was very likely removed for being unsubstantial. Just tell him to read the PM and it will state whether you or a mod deleted it.
Edit: That post by him is still there. Without knowing what the content was can't really help you further.
i will tell you what it said. Got message, told me I was posting bad things of sorts and should watch in future what I post. seriously fucking pissed me off, since I was only supporting and trying to help out. Dev just messaged me and said he was not responsible for this, in that case...guess maybe he was hacked?