D1494: develwarn: do not emit warning if "config" is unspecified

[yuja (Yuya Nishihara)]

yuja added a comment.


  > (Specifically picked yuja as reviewer since they reviewed the original
  >  https://www.mercurial-scm.org/repo/hg/rev/3f33831a9202,
  >  so hopefully can tell me whether this was intentional
  
  I think it was intentional during the migration to the config gating API,
  i.e. no gating unless `config=` is specified, but the current behavior is
  weird, and should be worth breaking the old API.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D1494

To: spectral, yuja, #hg-reviewers
Cc: mercurial-devel