.arcconfig

dagutil: remove ability to invert instances

The previous commit removed the last consumer of this feature.

.. api:: remove inverse() methods from classes in dagutil

Differential Revision: https://phab.mercurial-scm.org/D4323

{
    "conduit_uri": "https://phab.mercurial-scm.org/api",
    "repository.callsign": "HG",
    "arc.land.onto.default": "@",
    "base": "hg:.^"
}