1707224 html_util: remove html_document

1 file Authored by adamwill 2 years ago, Committed by plautrba 2 years ago,
    html_util: remove html_document
    
    I suspect this can safely be removed, because I don't think it
    has worked for six years. Since dbaaf0f it uses `six.string_types`
    but does not `import six`; if the function were ever called, it
    would crash immediately. I suggest this is reasonable proof that
    it's useless. Nothing in setroubleshoot itself calls it.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>