copies: drop the findlimit logic
We don't use the limit anymore so we should stop computing that limit.
I did not bother measuring the potential performance gain. I am assuming that
not running any code will be faster that doing some computation and not using
the result.
{
"conduit_uri": "https://phab.mercurial-scm.org/api",
"repository.callsign": "HG",
"arc.land.onto.default": "@",
"base": "hg:.^"
}