[feat] Use existing #happening_now method; respond to both html and json requests

config/routes.rb

@@ -154,8 +154,6 @@ Osem::Application.routes.draw do
     end
   end
   resources :conferences, only: [:index, :show] do
-    get 'live_events', to: 'conferences#live_events'
-
     resources :booths do
       member do
         patch :withdraw