Use default PYTHONWARNINGS setting.

Explicitly ignores the RedirectPanel's deprecation warning.

Author: tim-schilling

tox.ini

@@ -43,7 +43,7 @@ passenv=
     GITHUB_*
 setenv =
     PYTHONPATH = {toxinidir}
-    PYTHONWARNINGS = error,ignore:The RedirectsPanel is deprecated:DeprecationWarning
+    PYTHONWARNINGS = default,ignore:The RedirectsPanel is deprecated:DeprecationWarning
     DB_NAME = {env:DB_NAME:debug_toolbar}
     DB_USER = {env:DB_USER:debug_toolbar}
     DB_HOST = {env:DB_HOST:localhost}