Remove reno job and cap tox to version lower than 4bugfix/9.0

It does not make sense to run it on bugfix branches.
Tox is capped in all stable branches, let's cap it here as well.

Change-Id: Icfe8745ad3d5427f3c3c4395d86c313f29d158bf

1 files changed, 2 insertions, 0 deletions

diff --git a/tox.ini b/tox.ini
index c3006ab1..86e7eb09 100644
--- a/tox.ini
+++ b/tox.ini
@@ -2,6 +2,8 @@
 minversion = 3.18.0
 envlist = py3,functional,pep8
 ignore_basepython_conflict=true
+requires =
+  tox<4
 
 [testenv]
 basepython = python3