py3: use pickle directly
pycompat.pickle abstracted over the different pickle modules in
Python 2 and 3. Now that we're Python 3 only, it is safe to use the
`pickle` module directly. So this commit does that.
As part of this we remove the rules from check-code.py that were
forbidden direct pickle module use.
We retain the `util.pickle` symbol for backwards compatibility, just
in case some extensions were using it.
Differential Revision: https://phab.mercurial-scm.org/D12249
# __init__.py - Startup and module loading logic for Mercurial.
#
# Copyright 2015 Gregory Szorc <gregory.szorc@gmail.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from __future__ import absolute_import
# Allow 'from mercurial import demandimport' to keep working.
import hgdemandimport
demandimport = hgdemandimport