Remove 2to3 stuff

custom_fixers/fix_alt_unicode.py

-# Taken from jinja2. Thanks, Armin Ronacher.
-# See also http://lucumr.pocoo.org/2010/2/11/porting-to-python-3-a-guide
-
-
-from lib2to3 import fixer_base
-
-
-class FixAltUnicode(fixer_base.BaseFix):
-    PATTERN = "'__unicode__'"
-
-    def transform(self, node, results):
-        new = node.clone()
-        new.value = '__str__'
-        return new

setup.py

@@ -55,14 +55,6 @@ class Sdist(sdist):
 ROOT = os.path.abspath(os.path.dirname(__file__))
 README = open(os.path.join(ROOT, 'README')).read()
 
-if sys.version_info >= (3, 0):
-    extra = {
-        'use_2to3': True,
-        'use_2to3_fixers': ['custom_fixers'],
-    }
-else:
-    extra = {}
-
 install_requires = ['PyYAML>=3.01', 'latexcodec>=1.0.4', 'six']
 if sys.version_info < (2, 7):
     install_requires += ['Counter>=1.0.0']
@@ -171,5 +163,4 @@ setup(
         ],
     },
     zip_safe=True,
-    **extra
 )