Dont know your site, but be sure I would never come back to it if you dont have a RSS feed (and leave it within 2 secs if there is any ad on it).
You are alienating maybe a minority, but I think maybe a more valuable part of you readers - large part of HN readers use RSS (at least it seams so based on latest Google Reader deprecation).
There is no value in removing RSS, you are just crippling your site.