fedmsg / irc: disable most of the fedmsg-irc bots
    
    These bots are noisy and the stream of messages doesn't seem to have
    much use case. Most people in those channels already get emails and
    other notifications about these, so it just seems like noise.
    
    We keep fedora-fedmsg and fedora-fedmsg-stg overall ones, as they can be
    of use for some use cases.
    
    Signed-off-by: Kevin Fenzi <kevin@scrye.com>