Satisfy flake8 import rules F401 and F403

- Removed unused imports
- Ignore wildcard and unused imports from core modules (and avoid
  wildcard imports otherwise) to __init__ modules

Change-Id: Ie2e5f61ae37481f5d248788cfd83dc92ffddbd91

1 files changed, 1 insertions, 1 deletions

diff --git a/tox.ini b/tox.ini
index d9ada139..e56e56d8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -30,6 +30,6 @@ commands = {posargs}
 
 [flake8]
 show-source = true
-ignore = H,F841,F401,F403
+ignore = H,F841
 builtins = _
 exclude=.venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,tools,vendor