Revert "add server list refresh interval"

This reverts commit 36ad3f5b1acb5f88acf7b33863246e72a443a7e6.

crss-edge/crss-edge.yml

@@ -96,7 +96,6 @@ ribbon:
   ReadTimeout: 600000
   maxAutoRetries: 5
   MaxAutoRetriesNextServer: 10
-  ServerListRefreshInterval: 30000
 
 # NOTE: since the server is undertow who serve the static pages, the uploads config must be set here also
 #       if size was modified please update also the registration's application.yml