Remove railscasts image

app/views/podcasts/index.rss.builder

@@ -2,7 +2,7 @@ title = "FeedForward Podcast"
 author = "Chris Oliver & Rob Log"
 description = "Each day we post the most thought provoking articles we find on http://feedforward.io. We collect these articles to discuss them on the FeedForward Podcast and http://feedforward.io so that we can learn from each other's experiences. The topics are geared towards people interested in technology, improving their careers, and the impact they can make on the world."
 keywords = "technology, programming, articles, stories"
-image = "http://railscasts.com/images/railscasts_cover.jpg"
+image = ""
 ext = 'mp3'
 
 xml.instruct!