FeedBase derives from LaunchpadFormView for no good reason

[James Henstridge]

The FeedBase class in canonical.lazr.feed.feed derives from LaunchpadFormView, but does not appear to use any of the infrastructure. In fact, it seems that the view is not for a form at all.

Further more, it ends up disabling all the setup that LaunchpadFormView does:

    def initialize(self):
        """See `IFeed`."""
        # This method must not delegate to the superclass method as it does
        # things that are inappropriate (e.g. set up widgets) for a Feed
        # class. Therefore this implementation must not be removed and
        # invoking the super class version must not happen.
        pass

Is there any reason why this class doesn't just use LaunchpadView instead?