update source/conf.py (#372)

sphinx_docs/source/conf.py

@@ -20,7 +20,6 @@
 import os
 import re
 import sys
-import sphinx_rtd_theme
 import breathe
 import shlex
 import subprocess
@@ -56,6 +55,7 @@ def get_version():
               'sphinx.ext.autosummary',
               'numpydoc',
               'sphinx.ext.githubpages',
+              'sphinx_rtd_theme',
               'breathe',
               'IPython.sphinxext.ipython_console_highlighting',
               'sphinx.ext.intersphinx']
@@ -140,7 +140,6 @@ def get_version():
 # a list of builtin themes.
 #
 html_theme = 'sphinx_rtd_theme'
-html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the