Remove oauth2client from docs (#738)

* Use google-auth and google-auth-oauthlib in oauth2 docs.

* Remove basic server sample
diff --git a/docs/README.md b/docs/README.md
index 0bdda21..129a60a 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -7,8 +7,7 @@
 ## Features
 
 - Call Google APIs simply
-- Use the library with Google App Engine
-- Handle Auath with fewer lines of code
+- Handle Auth with fewer lines of code
 - Use standard tooling for installation
 
 ## Documentation
@@ -32,8 +31,6 @@
   - [Use Pagination](pagination.md)
   - [Improve Performance](performance.md)
   - [Understand Thread Safety](thread_safety.md)
-  - [Use Google App Engine](google_app_engine.md)
-  - [Use Django](django.md)
 
 ### Reference Documentation