remove pre 2.0 upgrade instructions

Author: xabbuh

UPGRADING-2.0.md

@@ -12,3 +12,55 @@ Upgrading From 1.x To 2.0
 
  * The `ViolationFormatterInterface` argument of the constructor of the `ParamFetcher` class was
    removed.
+
+ * The SensioFrameworkExtraBundle view annotations must be enabled to use the `ViewResponseListener`:
+
+   ```yaml
+   # app/config/config.yml
+   sensio_framework_extra:
+       view:
+           annotations: true
+   ```
+
+ * dropped support for the legacy ``Symfony\Component\Validator\ValidatorInterface``
+
+ * removed ``FOS\RestBundle\Util\Codes`` in favor of ``Symfony\Component\HttpFoundation\Response``
+
+ * compatibility with Symfony <2.7, JMS Serializer/SerializerBundle <1.0 and SensioFrameworkExtraBundle <3.0 was dropped
+
+ * RedirectView and RouteRedirectView view were removed. Use View::createRedirect and
+   View::createRouteRedirect instead. Note: the default status code for a route redirect
+   has changed from HTTP_CREATED (201) to HTTP_FOUND (302).
+
+ * constructor signature of DisableCSRFExtension was changed
+
+ * constructor signatures of most of the classes which used the container were changed
+
+ * removed ``callback_filter`` configuration option for the jsonp_handler
+
+ * ``exception_wrapper_handler`` is now the name of a service and not the name of a class
+
+ * removed all ``.class`` parameters, instead overwriting services via explicit Bundle configuration is preferred
+
+ * renamed ``AbstractScalarParam::$array`` to ``AbstractScalarParam::$map``
+
+ * added `ControllerTrait` for developers that prefer to use DI for their controllers instead of extending ``FOSRestController``
+
+ * when having an action called ``lockUserAction``, then it will have to use the http method ``LOCK`` (RFC-2518) instead of ``PATCH``. The following methods are affected by this change
+   * ``COPY``
+   * ``LOCK``
+   * ``MKCOL``
+   * ``MOVE``
+   * ``PROPFIND``
+   * ``PROPPATCH``
+   * ``UNLOCK``
+
+ * removed the ability of the ``AccessDeniedListener`` to render a response. Use the FOSRestBundle or the twig exception controller in complement.
+
+ * changed the priority of ``RequestBodyParamConverter`` to ``-50``
+
+ * made silent the ``RequestBodyParamConverter`` when a parameter is optional and it can't resolve it
+
+ * removed the ``format_negotiator`` option ``exception_fallback_format``; you can match the ``ExceptionController`` thanks to the ``attributes`` option instead
+
+ * `View::setSerializationContext` and `View::getSerializationContext` have been removed. Use `View::setContext` and `View::getContext` together with the new Context class instead.