Remove docs/sphinx and related references

README.rst

@@ -290,19 +290,6 @@ Testing with SyTest is recommended for verifying that changes related to the
 Client-Server API are functioning correctly. See the `installation instructions
 <https://github.com/matrix-org/sytest#installing>`_ for details.
 
-Building Internal API Documentation
-===================================
-
-Before building internal API documentation install sphinx and
-sphinxcontrib-napoleon::
-
-    pip install sphinx
-    pip install sphinxcontrib-napoleon
-
-Building internal API documentation::
-
-    python setup.py build_sphinx
-
 Troubleshooting
 ===============
 

changelog.d/8480.misc

@@ -0,0 +1 @@
+Remove outdated sphinx documentation, scripts and configuration.

docs/code_style.md

@@ -64,8 +64,6 @@ save as it takes a while and is very resource intensive.
     -   Use underscores for functions and variables.
 -   **Docstrings**: should follow the [google code
     style](https://google.github.io/styleguide/pyguide.html#38-comments-and-docstrings).
-    This is so that we can generate documentation with
-    [sphinx](http://sphinxcontrib-napoleon.readthedocs.org/en/latest/).
     See the
     [examples](http://sphinxcontrib-napoleon.readthedocs.io/en/latest/example_google.html)
     in the sphinx documentation.