All he said was that he knew you would add a new chapter. In accordance with the PFF&P rules, that's not a constructive comment, because it seems like he didn't actually read the story. If he did and wanted to leave a comment, he should have said something specific about the new chapter instead of that it was new and you posted it, a fact that is obvious if anyone looked at your thread.
I don't delete posts for the fun of it. I only delete them if they don't follow the rules. That's all.