Remove modular kickstarts for docker
    
    They are replaced by kickstarts from PR:
    https://pagure.io/fedora-kickstarts/pull-request/301
    
    They aren't needed because of:
    https://pagure.io/pungi-fedora/pull-request/403
    
    Signed-off-by: Tomas Mlcoch <tmlcoch@redhat.com>