Enable F405,F811 (Unused imports)

Remove imports that are either duplicate or unused

dist/ci/flake8.sh

@@ -3,4 +3,4 @@
 # Everything is blacklisted here only due to excessive hits in existing code
 # base. The ignores should be removed in the severity level (e.g. F first, then E, then W)
 find -type f -name "*.py" -print | grep -v abichecker | grep -v openqa | \
-    xargs flake8 --ignore=E501,E122,F401,F405,E302,E228,E128,E251,E201,E202,F811,E203,E305,F841,E265,E261,E266,E231,E712,E401,E126,E502,E222,E241,E711,E226,E125,E123,W293,W391,E731,E303,E101,E129,E227,E713,E225,E124,E402,E221,E127,E701,W601,E714,W503,E211
+    xargs flake8 --ignore=E501,E122,F401,E302,E228,E128,E251,E201,E202,E203,E305,F841,E265,E261,E266,E231,E712,E401,E126,E502,E222,E241,E711,E226,E125,E123,W293,W391,E731,E303,E101,E129,E227,E713,E225,E124,E402,E221,E127,E701,W601,E714,W503,E211

factory-package-news/factory-package-news-web.py

@@ -28,7 +28,6 @@ import os
 import sys
 from urlparse import urlparse
 
-import re
 digits_re = re.compile('^[0-9]+$')
 
 BASE_DIR = '/var/lib'

factory-package-news/factory-package-news.py

@@ -22,7 +22,7 @@
 
 
 from pprint import pprint
-import os, sys, re, io
+import os, sys, io
 import logging
 from optparse import OptionParser
 import rpm

manager_42.py

@@ -29,7 +29,6 @@ from xml.etree import cElementTree as ET
 import osc.conf
 import osc.core
 import urllib2
-import sys
 import time
 import yaml
 from collections import namedtuple