Readme: remove outdated text about building on rtd

Author: Blendify

README.rst

@@ -280,25 +280,6 @@ When you're done with your edits, you can run ``grunt build`` to clean out the o
 files and rebuild a new distribution, compressing the css and cleaning out
 extraneous files. Please do this before you send in a PR.
 
-Using this theme locally, then building on Read the Docs?
-==========================================================
-
-Currently if you import sphinx_rtd_theme in your local sphinx build, then pass
-that same config to Read the Docs, it will fail, since RTD gets confused. If
-you want to run this theme locally and then also have it build on RTD, then
-you can add something like this to your config. Thanks to Daniel Oaks for this.
-
-.. code:: python
-
-    # on_rtd is whether we are on readthedocs.org, this line of code grabbed from docs.readthedocs.org
-    on_rtd = os.environ.get('READTHEDOCS', None) == 'True'
-
-    if not on_rtd:  # only import and set the theme if we're building docs locally
-        import sphinx_rtd_theme
-        html_theme = 'sphinx_rtd_theme'
-        html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
-
-    # otherwise, readthedocs.org uses their theme by default, so no need to specify it
 
 TODO
 ====