Revert "Update tox.ini"

This reverts commit 8b41cc5.

Author: browniebroke

tox.ini

@@ -32,6 +32,7 @@ dependency_groups =
 dependency_groups =
        test
 deps =
+pass_env =
 
 [testenv:dist]
 commands = python -W error::DeprecationWarning -W error::PendingDeprecationWarning runtests.py --no-pkgroot --staticfiles {posargs}