Remove dead examples directory from flake8 invocation. (#914)

Author: benjaminp

tox.ini

@@ -56,7 +56,7 @@ deps =
      flake8
 skip_install = true
 commands =
-     flake8 src tests examples setup.py
+     flake8 src tests setup.py
 
 [testenv:pypi-readme]
 deps =