Per @tseaver, remove jython-specific references since tox currently cannot test it.

CHANGES.rst

@@ -4,7 +4,10 @@ Changes
 1.4.4 (unreleased)
 ------------------
 
-- Add support for PyPy3 and Jython 2.7.
+- Use the standard ``valuerefs()`` method rather than relying on
+  implementation details of ``WeakValueDictionary`` in ``WeakSet``.
+
+- Add support for PyPy3.
 
 - Require 100% branch coverage (in addition to 100% statement coverage).
 

setup.py

@@ -48,7 +48,6 @@ setup(name='transaction',
         "Programming Language :: Python :: 3.4",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
-        "Programming Language :: Python :: Implementation :: Jython",
         "Framework :: ZODB",
         ],
       author="Zope Corporation",

tox.ini

 [tox]
-# Jython 2.7rc2 does work, but unfortunately has an issue running
-# with Tox 1.9.2 (apparently its non-interactive console still prints
-# interactive prompts ):
-#   $ tox -e jython
-#   ...
-#   ERROR: InvocationError: Failed to get version_info for jython: could not decode ">>> ... ... ... >>> {'version_info': (2, 7, 0, 'candidate', 2)}\n>>> "
+# Jython 2.7rc2+ does work, but unfortunately has an issue running
+# with Tox 1.9.2 (see https://github.com/pypa/virtualenv/pull/746)
 envlist =
     py26,py27,pypy,py32,py33,py34,pypy3,coverage,docs
 
@@ -13,10 +9,6 @@ commands =
     python setup.py test -q
 deps = transaction
 
-[testenv:jython]
-commands =
-   jython setup.py test -q
-
 [testenv:coverage]
 basepython =
     python2.6