Revert "Include dhcp-client in BaseOS variant."
    
    This reverts commit cfb36f1b81d706badb95fab06ddbdd95f4f59d67.
    
    NetworkManager uses it's own built in dhcp client now as does systemd,
    basically dhcp-client is irrelevant for most use cases now
    so it shouldn't be there by default.
    
    Instead, we are removing the "dhcp-client" from the kickstart file
    so it is not needed to build the images.
    
    Signed-off-by: Jan Kaluza <jkaluza@redhat.com>