Remove useless route definition

This route causes the node controller to fail with "No route matches"
error when requesting nodes for a cluster.

config/routes.rb

@@ -22,7 +22,6 @@ Api::Application.routes.draw do
   get '/versions/:id' => 'versions#show', :via => [:get]
   get '*resource/versions' => 'versions#index', :via => [:get]
   get '*resource/versions/:id' => 'versions#show', :via => [:get]
-  get '/sites/:site_id/clusters/:id/nodes' => 'nodes#index', :via => [:get]
 
   resources :environments, only: %i[index show], constraints: { id: /[0-9A-Za-z\-\.]+/	}
   resources :network_equipments, only: %i[index show]