Revert "Use drf-yasg for Open API documentation"

openedx/core/djangoapps/user_api/accounts/tests/test_views.py

@@ -551,7 +551,7 @@ class TestAccountsAPI(CacheIsolationTestCase, UserAPITestCase):
         ("level_of_education", "none", u"ȻħȺɍłɇs", u'"ȻħȺɍłɇs" is not a valid choice.'),
         ("country", "GB", "XY", u'"XY" is not a valid choice.'),
         ("year_of_birth", 2009, "not_an_int", u"A valid integer is required."),
-        ("name", "bob", "z" * 256, u"Ensure this field has no more than 255 characters."),
+        ("name", "bob", "z" * 256, u"Ensure this value has at most 255 characters (it has 256)."),
         ("name", u"ȻħȺɍłɇs", "   ", u"The name field must be at least 1 character long."),
         ("goals", "Smell the roses"),
         ("mailing_address", "Sesame Street"),

openedx/core/djangoapps/user_api/preferences/tests/test_api.py

@@ -470,7 +470,7 @@ def get_expected_validation_developer_message(preference_key, preference_value):
         preference_key=preference_key,
         preference_value=preference_value,
         error={
-            "key": [u"Ensure this field has no more than 255 characters."]
+            "key": [u"Ensure this value has at most 255 characters (it has 256)."]
         }
     )
 

openedx/core/djangoapps/user_api/serializers.py

@@ -34,8 +34,6 @@ class UserSerializer(serializers.HyperlinkedModelSerializer):
         # This list is the minimal set required by the notification service
         fields = ("id", "url", "email", "name", "username", "preferences")
         read_only_fields = ("id", "email", "username")
-        # For disambiguating within the drf-yasg swagger schema
-        ref_name = 'user_api.User'
 
 
 class UserPreferenceSerializer(serializers.HyperlinkedModelSerializer):