(PDB-5484) http.facts-test: remove vestigial compare-structured-response
(PDB-5484) http.facts-test: remove vestigial compare-structured-response

Remove it, instead of just marking the version argument unused.  It
wasn't needed after 019cf18e18cfa566a9eaa20339b41e0c8dad0e87.

puppetlabs/puppetdb,puppetlabs/puppetdb,puppetlabs/puppetdb,puppetlabs/puppetdb,puppetlabs/puppetdb