remove pinned twisted version

Archmonger · Archmonger · commit d4776fe6fa91 · 2021-09-07T00:44:49.000-07:00
diff --git a/requirements/test-env.txt b/requirements/test-env.txt
@@ -1,6 +1,3 @@
 django
 selenium
-
-# required due issue with channels:
-# https://github.com/django/channels/issues/1639#issuecomment-817994671
-twisted<21
+twisted
