remove unused packages to simplify understanding (d2l-ai#449)

oneTaken · astonzhang · commit f981a7b73bab · 2018-12-12T10:25:13.000-08:00
diff --git a/setup.py b/setup.py
@@ -3,8 +3,7 @@
 import os
 import re
 from setuptools import setup, find_packages
-import shutil
-import sys
+
 
 def read(*names, **kwargs):
     with io.open(
