a little file cleanup.

app/assets/javascripts/cable.js

@@ -1,13 +0,0 @@
-// Action Cable provides the framework to deal with WebSockets in Rails.
-// You can generate new channels where WebSocket features live using the rails generate channel command.
-//
-//= require action_cable
-//= require_self
-//= require_tree ./channels
-
-(function() {
-  this.App || (this.App = {});
-
-  App.cable = ActionCable.createConsumer();
-
-}).call(this);

app/channels/application_cable/channel.rb

@@ -1,4 +0,0 @@
-module ApplicationCable
-  class Channel < ActionCable::Channel::Base
-  end
-end

app/channels/application_cable/connection.rb

@@ -1,4 +0,0 @@
-module ApplicationCable
-  class Connection < ActionCable::Connection::Base
-  end
-end

app/jobs/application_job.rb

@@ -1,2 +0,0 @@
-class ApplicationJob < ActiveJob::Base
-end

app/mailers/application_mailer.rb

@@ -1,4 +0,0 @@
-class ApplicationMailer < ActionMailer::Base
-  default from: 'from@example.com'
-  layout 'mailer'
-end