fedora-atomic: don't make compsfile in script
    
    This is done by pungi for us now. See [1]
    
    [1] https://pagure.io/pungi-fedora/blob/5f99504deaea19b24b22a59ec726aac91ae9cb42/f/fedora-atomic.conf#_12-18
    
    Signed-off-by: Dusty Mabe <dusty@dustymabe.com>