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

--- a/hgext/histedit.py	Wed Mar 02 17:51:27 2022 -0800
+++ b/hgext/histedit.py	Tue Mar 01 20:29:03 2022 -0800
@@ -202,6 +202,7 @@
 
 import functools
 import os
+import pickle
 import struct
 
 from mercurial.i18n import _
@@ -245,7 +246,6 @@
     urlutil,
 )
 
-pickle = util.pickle
 cmdtable = {}
 command = registrar.command(cmdtable)