remove journald build tag, upstream make script has it already
    
    [...]
    +++ go build -o bundles/1.10.1/dynbinary/docker-1.10.1 -a -tags 'autogen
    sqlite_omit_load_extension selinux journald seccomp daemon journald'
    -installsuffix netgo -ldflags '
    [...]
    
    we can see it's duplicated (checked with pkgconfig in hack/make.sh)
    
    Signed-off-by: Antonio Murdaca <runcom@redhat.com>