Link to Python gRPC page on grpc.io

The newly updated [gRPC Python](https://grpc.io/docs/languages/python/) page, contains links to the quick start, tutorial, examples and more! Link directly to that page, rather than refer to only part of its contents.

doc/python/sphinx/grpc.rst

@@ -3,18 +3,7 @@ gRPC
 
 .. module:: grpc
 
-Tutorial
---------
-
-If you want to see gRPC in action first, visit the `Python Quickstart <https://grpc.io/docs/languages/python/quickstart>`_.
-Or, if you would like dive in with more extensive usage of gRPC Python, check `gRPC Basics - Python <https://grpc.io/docs/languages/python/basics>`_ out.
-
-
-Example
--------
-
-Go to `gRPC Python Examples <https://github.com/grpc/grpc/tree/master/examples/python>`_
-
+For documentation, examples, and more, see the `Python gRPC <https://grpc.io/docs/languages/python/>`_ page on `grpc.io <https://grpc.io/>`_.
 
 Module Contents
 ---------------