remove custom_fixers. it is not needed anymore.

custom_fixers/fix_alt_unicode.py

@@ -1,12 +0,0 @@
-from lib2to3.fixer_base import BaseFix
-from lib2to3.fixer_util import Name
-
-class FixAltUnicode(BaseFix):
-    PATTERN = """
-    func=funcdef< 'def' name='__unicode__'
-                  parameters< '(' NAME ')' > any+ >
-    """
-
-    def transform(self, node, results):
-        name = results['name']
-        name.replace(Name('__str__', prefix=name.prefix))

setup.py

@@ -173,7 +173,7 @@ setup(
         'Topic :: Utilities',
     ],
     platforms='any',
-    packages=find_packages(exclude=['custom_fixers', 'test']),
+    packages=find_packages(exclude=['test']),
     include_package_data=True,
     entry_points={
         'console_scripts': [