From 1a8ad8a5c6f3344959e81531177164d1c4c4e52a Mon Sep 17 00:00:00 2001
From: Nick Pope <nick.pope@flightdataservices.com>
Date: Fri, 2 Oct 2020 12:21:15 +0100
Subject: [PATCH] Removed unused custom exception support for ImmutableList.

If the warning provided was an instance of Exception, then it would be
used as-is. In practice this is untested, unused and ImmutableList is
an undocumented internal datastructure.
---
 django/utils/datastructures.py | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/django/utils/datastructures.py b/django/utils/datastructures.py
index 083cf3cb8b..740ad5a86d 100644
--- a/django/utils/datastructures.py
+++ b/django/utils/datastructures.py
@@ -230,11 +230,8 @@ class ImmutableList(tuple):
         self.warning = warning
         return self
 
-    def complain(self, *wargs, **kwargs):
-        if isinstance(self.warning, Exception):
-            raise self.warning
-        else:
-            raise AttributeError(self.warning)
+    def complain(self, *args, **kwargs):
+        raise AttributeError(self.warning)
 
     # All list mutation functions complain.
     __delitem__ = complain