D1606: phases: drop the list with phase of each rev, always comput phase sets

[quark (Jun Wu)]

quark accepted this revision.
quark added a comment.


  I think this is good enough. We can migrate `revset.py` `public()` implementation later.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D1606

To: joerg.sonnenberger, #hg-reviewers, quark
Cc: durin42, quark, mercurial-devel