hgweb: don't pass wsgireq to makeindex and other functions
We only ever access attributes that are available on our newer
request type. So we no longer need this argument.
Differential Revision: https://phab.mercurial-scm.org/D2826
{
"conduit_uri": "https://phab.mercurial-scm.org/api",
"repository.callsign": "HG",
"arc.land.onto.default": "@",
"base": "hg:.^"
}