Cleanup Sphinx config

Change-Id: Iea63ec709fda82685c5f484d643627213cdc1496

docs/source/conf.py

diff --git a/docs/source/conf.py b/docs/source/conf.py
index 1f67873..09f6137 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -11,8 +11,6 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
-import sys, 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
 # documentation root, use os.path.abspath to make it absolute, like shown here.
@@ -30,9 +28,6 @@
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
 
-# The suffix of source filenames.
-source_suffix = '.rst'
-
 # The encoding of source files.
 #source_encoding = 'utf-8-sig'
 
@@ -98,9 +93,7 @@
 #html_theme_options = {}
 
 # Add any paths that contain custom themes here, relative to this directory.
-html_theme_path = ["_themes",]
-import sphinx_rtd_theme
-html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
+# html_theme_path = ["_themes",]
 
 # The name for this set of Sphinx documents.  If None, it defaults to
 # "<project> v<release> documentation".