Revert "Fix SubscriptionRestView with Django Rest Framework 3.7.x"

This reverts commit 89841c6.

djstripe/contrib/rest_framework/views.py

@@ -52,13 +52,9 @@ def post(self, request, **kwargs):
                     subscriber=subscriber_request_callback(self.request)
                 )
                 customer.add_card(serializer.data["stripe_token"])
-                charge_immediately = serializer.data.get("charge_immediately")
-                if charge_immediately is None:
-                    charge_immediately = True
-
                 customer.subscribe(
                     serializer.data["plan"],
-                    charge_immediately
+                    serializer.data.get("charge_immediately", True)
                 )
                 return Response(serializer.data, status=status.HTTP_201_CREATED)
             except Exception:

tests/test_contrib/test_views.py

@@ -60,7 +60,6 @@ def test_create_subscription(self, add_card_mock, subscribe_mock):
         add_card_mock.assert_called_once_with(customer, "cake")
         subscribe_mock.assert_called_once_with(customer, "test0", True)
         self.assertEqual(response.status_code, status.HTTP_201_CREATED)
-        data["charge_immediately"] = None
         self.assertEqual(response.data, data)
 
     @patch("djstripe.models.Customer.subscribe", autospec=True)