`examples` seems to be installed to site-packages.
I believe the offending line is in [`setup.py`](https://github.com/graphql-python/graphene/blob/e71a52140a89946d0e9abdfb95c340dbe34179be/setup.py#L86). We should probably remove this.
diff --git a/setup.py b/setup.py
index 52d7de0..d1ec313 100644
--- a/setup.py
+++ b/setup.py
@@ -83,7 +83,7 @@ setup(
 
     keywords='api graphql protocol rest relay graphene',
 
-    packages=find_packages(exclude=['tests', 'tests.*']),
+    packages=find_packages(exclude=['tests', 'tests.*', 'examples']),
 
     install_requires=[
         'six>=1.10.0,<2',
['setup.py']