Merge pull request #112 from bckohan/v2.x.x

remove rtd theme

Author: bckohan

doc/source/conf.py

@@ -49,7 +49,6 @@
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
 extensions = [
-    'sphinx_rtd_theme',
     'sphinx.ext.autodoc',
     'sphinx.ext.todo',
     'sphinxcontrib.typer',