Remove now unused ListDictField from base serializers

api/base/serializers.py

@@ -5,7 +5,6 @@
 import furl
 from django.core.urlresolvers import resolve, reverse, NoReverseMatch
 from django.core.exceptions import ImproperlyConfigured
-from django.utils import six
 
 from rest_framework import exceptions, permissions
 from rest_framework import serializers as ser
@@ -963,27 +962,6 @@ def to_representation(self, obj):
         return ret
 
 
-class ListDictField(ser.DictField):
-
-    def __init__(self, **kwargs):
-        super(ListDictField, self).__init__(**kwargs)
-
-    def to_representation(self, value):
-        """
-        Ensure the value of each key in the Dict to be a list
-        """
-        res = {}
-        for key, val in value.items():
-            if isinstance(self.child.to_representation(val), list):
-                res[six.text_type(key)] = self.child.to_representation(val)
-            else:
-                if self.child.to_representation(val):
-                    res[six.text_type(key)] = [self.child.to_representation(val)]
-                else:
-                    res[six.text_type(key)] = []
-        return res
-
-
 _tpl_pattern = re.compile(r'\s*<\s*(\S*)\s*>\s*')