remove legacy swap
    
    Anaconda will enable swap on ZRAM service for Lives, which makes this unnecessary, so remove it.

    

    Upstream anaconda proposal and discussion

    https://www.redhat.com/archives/anaconda-devel-list/2019-June/msg00011.html

    Previous Workstation WG approval

    https://pagure.io/fedora-workstation/issue/75