Create the component config.(kubernetes-sigs#245)

Add deprecated in the doc.

Signed-off-by: yanghesong <hesong.yang@foxmail.com>

simulator/docs/env-variables.md

@@ -6,6 +6,9 @@ used to configure kube-scheduler-simulator.
 Please refer [docker-compose.yml](./../../docker-compose.yml) as an example
 use.
 
+## For Simulator
+This part is deprecated. Please refer to the simulator [config.yml](./../config.yml).
+
 `PORT`: (required) This is the port number on which kube-scheduler-simulator
 server is started.