Fix pylint error in box session.

Jeff-Meadows · Jeff-Meadows · commit c47319fe7fb5 · 2018-03-29T14:37:00.000-07:00
diff --git a/boxsdk/session/box_session.py b/boxsdk/session/box_session.py
@@ -274,6 +274,7 @@ def _get_retry_request_callable(self, network_response, attempt_number, request)
                 self._get_retry_after_time(attempt_number, network_response.headers.get('Retry-After', None)),
                 self._send_request,
             )
+        return None
 
     def _raise_on_unsuccessful_request(self, network_response, request):
         """

Original file line number	Diff line number	Diff line change
`@@ -274,6 +274,7 @@ def _get_retry_request_callable(self, network_response, attempt_number, request)`
`274`	`274`	`self._get_retry_after_time(attempt_number, network_response.headers.get('Retry-After', None)),`
`275`	`275`	`self._send_request,`
`276`	`276`	`)`
	`277`	`+ return None`
`277`	`278`
`278`	`279`	`def _raise_on_unsuccessful_request(self, network_response, request):`
`279`	`280`	`"""`