Extract modern code from get_names_and_managers in compat.py and remove compat code

rest_framework/compat.py

@@ -78,25 +78,6 @@ def distinct(queryset, base):
     return queryset.distinct()
 
 
-# TODO: Remove
-# Obtaining manager instances and names from model options differs after 1.10.
-def get_names_and_managers(options):
-    if django.VERSION >= (1, 10):
-        # Django 1.10 onwards provides a `.managers` property on the Options.
-        return [
-            (manager.name, manager)
-            for manager
-            in options.managers
-        ]
-    # For Django 1.8 and 1.9, use the three-tuple information provided
-    # by .concrete_managers and .abstract_managers
-    return [
-        (manager_info[1], manager_info[2])
-        for manager_info
-        in (options.concrete_managers + options.abstract_managers)
-    ]
-
-
 # TODO: Remove
 # field.rel is deprecated from 1.9 onwards
 def get_remote_field(field, **kwargs):

rest_framework/utils/representation.py

@@ -10,13 +10,18 @@ from django.db import models
 from django.utils.encoding import force_text
 from django.utils.functional import Promise
 
-from rest_framework.compat import get_names_and_managers, unicode_repr
+from rest_framework.compat import unicode_repr
 
 
 def manager_repr(value):
     model = value.model
     opts = model._meta
-    for manager_name, manager_instance in get_names_and_managers(opts):
+    names_and_managers = [
+        (manager.name, manager)
+        for manager
+        in opts.managers
+    ]
+    for manager_name, manager_instance in names_and_managers:
         if manager_instance == value:
             return '%s.%s.all()' % (model._meta.object_name, manager_name)
     return repr(value)