store: cleanup what is recognized as a revlog file
The temporary file from `censor` are not relevant to the store as they are just
temporary. So let `fncache` and `datafiles` forget about them.
{
"conduit_uri": "https://phab.mercurial-scm.org/api",
"phabricator.uri": "https://phab.mercurial-scm.org/",
"repository.callsign": "HG",
"arc.land.onto.default": "@",
"base": "hg:.^"
}