.arcconfig

rebase: remove unnecessary confirm block

Removed unnecessary 'if confirm:' block as that thing is now
handled at 'finally'.

Differential Revision: https://phab.mercurial-scm.org/D3945

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