README.md in opentelemetry-instrumentation-action_pack-0.3.2 vs README.md in opentelemetry-instrumentation-action_pack-0.4.0

@@ -28,27 +28,9 @@
 OpenTelemetry::SDK.configure do |c|
   c.use_all
 end
 ```
 
-### Configuration options
-
-| Name  | Default | Description |
-| ----- | ------- | ----------- |
-| `span_naming`  | `:rails_route`  | Configures the name for the Rack span. `:rails_route` is in the format of `HTTP_METHOD /rails/route(.:format)`, for example `GET /users/:id(.:format)`. `:controller_action` is in the format of `Controller#action`, for example `UsersController#show` |
-| `enable_recognize_route`  | `true`  | Enables or disables adding the `http.route` attribute. |
-
-The default configuration uses a [method from Rails to obtain the route for the request](https://github.com/rails/rails/blob/v6.1.3/actionpack/lib/action_dispatch/journey/router.rb#L65). The options above allow this behaviour to be opted out of if you have performance issues. If you wish to avoid using this method then set `span_naming: :controller_action, enable_recognize_route: false`.
-
-```ruby
-OpenTelemetry::SDK.configure do |c|
-  c.use 'OpenTelemetry::Instrumentation::ActionPack', {
-    span_naming: :controller_action,
-    enable_recognize_route: false
-  }
-end
-```
-
 ## Examples
 
 Example usage can be seen in the `./example/trace_demonstration.rb` file [here](https://github.com/open-telemetry/opentelemetry-ruby-contrib/blob/main/instrumentation/action_pack/example/trace_demonstration.ru)
 
 ## How can I get involved?