Removing unnecessary top-level TOC for all modules.

If we had more than one base package, it would be
relevant, but we only have oauth2client, so it is
irrelevant and just visually distracting.

docs/index.rst

@@ -50,7 +50,7 @@ contributor license agreement.
    :maxdepth: 1
    :hidden:
 
-   source/modules
+   source/oauth2client
 
 Supported Python Versions
 -------------------------

docs/source/modules.rst

@@ -1,7 +0,0 @@
-oauth2client
-============
-
-.. toctree::
-   :maxdepth: 4
-
-   oauth2client

scripts/build-docs

@@ -25,6 +25,8 @@ fi
 
 rm -rf docs/_build/* docs/source/*
 sphinx-apidoc -f -o docs/source oauth2client
+# We only have one package, so modules.rst is overkill.
+rm -f docs/source/modules.rst
 cd docs
 make html
 cd ..