Patch copied from Gentoo removing obsolete Python2 code.

--- a/chai/chai.py
+++ b/chai/chai.py
@@ -62,11 +62,6 @@
             try:
                 func(self, *args, **kwargs)
             except UnexpectedCall as e:
-                # if this is not python3, use python2 syntax
-                if not hasattr(e, '__traceback__'):
-                    from .python2 import reraise
-                    reraise(
-                        AssertionError, '\n\n' + str(e), sys.exc_info()[-1])
                 exc = AssertionError('\n\n' + str(e))
                 setattr(exc, '__traceback__', sys.exc_info()[-1])
                 raise exc
--- a/chai/python2.py
+++ b/chai/python2.py
@@ -1,3 +0,0 @@
-
-def reraise(exc, msg, traceback):
-    raise exc, msg, traceback
--- a/chai.egg-info/SOURCES.txt
+++ b/chai.egg-info/SOURCES.txt
@@ -10,7 +10,6 @@
 chai/exception.py
 chai/expectation.py
 chai/mock.py
-chai/python2.py
 chai/spy.py
 chai/stub.py
 chai.egg-info/PKG-INFO
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<tr><td><span title='2023-12-27 12:13:10 +0100'>2023-12-27</span></td><td><a href='/guix/commit/gnu/packages/gnupg.scm?id=756ba0429e84ee0f8ce30484439b78c00c61d286'>gnu: Add torbrowser.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/tor.scm (torbrowser): New variable.
(torbrowser-assets): New variable.
* gnu/packages/browser-extensions.scm (noscript): New variable.
(noscript/icecat): New variable.

Co-authored-by: André Batista &lt;nandre@riseup.net&gt;
Change-Id: I73dc53905e4a028108bb34aae07e44256cf16c85
</span></span></td><td>Clément Lassieur</td></tr>
<tr><td><span title='2023-12-11 23:11:26 +0100'>2023-12-11</span></td><td><a href='/guix/commit/gnu/packages/gnupg.scm?id=7217c9348679d00ebf80fe5285564f6bb198a8fd'>gnu: libgpg-error: Do not assume that target is a triplet.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes a bug exposed with be5ec2ebb4bde4b4f702a30f08849dff05cceccd, which
introduces the “avr” target, which has no hyphen.

* gnu/packages/gnupg.scm (libgpg-error)[arguments]: In ‘cross-symlinks’
phase, adjust code to deal with TARGET lacking a hyphen.

Change-Id: I1aff6a94a7c92626f931c459d1dc0509f9bcfc00
</span></span></td><td>Ludovic Courtès</td></tr>