Remove useless files;

docs/examples.rst

-Examples
-========
-
-Common setup:
-
-.. code-block:: python
-
-   import jpush as jpush
-   _jpush = jpush.JPush(app_key, master_secret)
-
-Simple broadcast to all devices
--------------------------------
-
-.. code-block:: python
-
-   push = _jpush.create_push()
-   push.audience = jpush.all_
-   push.notification = jpush.notification(alert="Hello, world!")
-   push.platform = jpush.all_
-   push.send()
-
-
-Complex audience with iOS & Android specifics
----------------------------------------------
-
-.. code-block:: python
-
-   push = _jpush.create_push()
-   push.audience = jpush.audience(
-      jpush.tag("breakingnews"),
-      jpush.tag_and("sports"),
-      )
-   )
-   push.notification = jpush.notification(
-      ios=jpush.ios(
-         alert="JPush ios test",
-         badge="1",
-         extras={"articleid": "123456"}
-      ),
-      android=jpush.android(
-         alert="Breaking Special Android News!",
-         extras={"articleid": "http://m.example.com/123456"}
-      )
-   )
-   push.platform = jpush.platform('ios', 'android')
-   push.send()
-
-
-Single iOS push
----------------
-
-.. code-block:: python
-
-   push = _jpush.create_push()
-   push.audience = jpush.registration_id('fffffffffff')
-   push.notification = jpush.notification(
-       ios=jpush.ios(alert="JPush powers your apps"))
-   push.platform = jpush.platform('ios')
-   push.send()