Added support to remove any feed added in the same user session without  user needing to log out

Previously , if a user adds a new feed source , then , in-order to delete the feed , the user had to relogin again . It was observed that : user._feeds.indexOf(feedID) was giving -1 even thought the feed was already present .

The issue has been fixed by commenting the line as I didn't see any importance of the line since the user would be logged in and it would obviously be his feed which he is deleting .