Activate pep8 check that _ is imported

Remove the specification in tox.ini that _ is a builtin so that
it will no longer assume that _ does not need to be imported.
This helps ensure that the _ from i18n is used.

Activating this check did not flag any violations.

Change-Id: I7b3528e07aee6138563ad83c2caa08ecbe49f933

1 files changed, 0 insertions, 1 deletions

diff --git a/tox.ini b/tox.ini
index 7363931..9de1197 100644
--- a/tox.ini
+++ b/tox.ini
@@ -33,5 +33,4 @@ commands = oslo_debug_helper {posargs}
 
 show-source = True
 ignore = E123,E125,H803
-builtins = _
 exclude=.venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build