Remove unused imports for flake8 compliance

Remove unused imports from `docs/conf.py` and `setup.py`.

docs/conf.py

@@ -13,8 +13,8 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
-import sys
-import os
+# import sys
+# import os
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the

setup.py

@@ -2,11 +2,9 @@
 import os
 import sys
 from setuptools import setup, Extension, Command
-from distutils.command.build import build
 from distutils.command.build_ext import build_ext
 from distutils.errors import (
     CCompilerError, DistutilsExecError, DistutilsPlatformError)
-from distutils import log
 
 # large portions ripped off from simplejson's setup.py