Remove unused ActionCable standalone files

We decided not to support running ActionCable on a separate Puma process
so we no longer need these files

.gitignore

@@ -45,7 +45,6 @@ eslint-report.html
 /config/redis.trace_chunks.yml
 /config/unicorn.rb
 /config/puma.rb
-/config/puma_actioncable.rb
 /config/secrets.yml
 /config/sidekiq.yml
 /config/registry.key

bin/actioncable

-#!/bin/sh
-
-set -e
-
-cd $(dirname $0)/..
-app_root=$(pwd)
-
-puma_pidfile="$app_root/tmp/pids/puma_actioncable.pid"
-puma_config="$app_root/config/puma_actioncable.rb"
-
-spawn_puma()
-{
-  exec bundle exec puma --config "${puma_config}" --environment "$RAILS_ENV" "$@"
-}
-
-get_puma_pid()
-{
-  pid=$(cat "${puma_pidfile}")
-  if [ -z "$pid" ] ; then
-    echo "Could not find a PID in $puma_pidfile"
-    exit 1
-  fi
-  echo "${pid}"
-}
-
-start()
-{
-  spawn_puma -d
-}
-
-start_foreground()
-{
-  spawn_puma
-}
-
-stop()
-{
-  get_puma_pid
-  kill -INT "$(get_puma_pid)"
-}
-
-reload()
-{
-  kill -USR2 "$(get_puma_pid)"
-}
-
-case "$1" in
-  start)
-    start
-    ;;
-  start_foreground)
-    start_foreground
-    ;;
-  stop)
-    stop
-    ;;
-  reload)
-    reload
-    ;;
-  *)
-    echo "Usage: RAILS_ENV=your_env $0 {start|start_foreground|stop|reload}"
-    ;;
-esac

cable/config.ru

-# frozen_string_literal: true
-
-require ::File.expand_path('../../config/environment', __FILE__)
-Rails.application.eager_load!
-
-ACTION_CABLE_SERVER = true
-
-use ActionDispatch::RequestId, header: Rails.application.config.action_dispatch.request_id_header
-
-run ActionCable.server

config/puma_actioncable.example.development.rb

-# frozen_string_literal: true
-
-# -----------------------------------------------------------------------
-# This file is used by the GDK to generate a default config/puma_actioncable.rb file
-# Note that `/home/git` will be substituted for the actual GDK root
-# directory when this file is generated
-# -----------------------------------------------------------------------
-
-# Load "path" as a rackup file.
-#
-# The default is "cable/config.ru".
-#
-rackup 'cable/config.ru'
-pidfile '/home/git/gitlab/tmp/pids/puma_actioncable.pid'
-state_path '/home/git/gitlab/tmp/pids/puma_actioncable.state'
-
-## Uncomment the lines if you would like to write puma stdout & stderr streams
-## to a different location than rails logs.
-## When using GitLab Development Kit, by default, these logs will be consumed
-## by runit and can be accessed using `gdk tail rails-actioncable`
-# stdout_redirect '/home/git/gitlab/log/puma_actioncable.stdout.log',
-#  '/home/git/gitlab/log/puma_actioncable.stderr.log',
-#  true
-
-# Configure "min" to be the minimum number of threads to use to answer
-# requests and "max" the maximum.
-#
-# The default is "0, 16".
-#
-threads 1, 4
-
-# By default, workers accept all requests and queue them to pass to handlers.
-# When false, workers accept the number of simultaneous requests configured.
-#
-# Queueing requests generally improves performance, but can cause deadlocks if
-# the app is waiting on a request to itself. See https://github.com/puma/puma/issues/612
-#
-# When set to false this may require a reverse proxy to handle slow clients and
-# queue requests before they reach puma. This is due to disabling HTTP keepalive
-queue_requests false
-
-# Bind the server to "url". "tcp://", "unix://" and "ssl://" are the only
-# accepted protocols.
-bind 'unix:///home/git/gitlab_actioncable.socket'
-
-workers 1
-
-require_relative "/home/git/gitlab/lib/gitlab/cluster/lifecycle_events"
-
-on_restart do
-  # Signal application hooks that we're about to restart
-  Gitlab::Cluster::LifecycleEvents.do_before_master_restart
-end
-
-before_fork do
-  # Signal to the puma killer
-  Gitlab::Cluster::PumaWorkerKillerInitializer.start @config.options unless ENV['DISABLE_PUMA_WORKER_KILLER']
-
-  # Signal application hooks that we're about to fork
-  Gitlab::Cluster::LifecycleEvents.do_before_fork
-end
-
-Gitlab::Cluster::LifecycleEvents.set_puma_options @config.options
-on_worker_boot do
-  # Signal application hooks of worker start
-  Gitlab::Cluster::LifecycleEvents.do_worker_start
-end
-
-# Preload the application before starting the workers; this conflicts with
-# phased restart feature. (off by default)
-
-preload_app!
-
-tag 'gitlab-actioncable-puma-worker'
-
-# Verifies that all workers have checked in to the master process within
-# the given timeout. If not the worker process will be restarted. Default
-# value is 60 seconds.
-#
-worker_timeout 60
-
-# https://github.com/puma/puma/blob/master/5.0-Upgrade.md#lower-latency-better-throughput
-wait_for_less_busy_worker ENV.fetch('PUMA_WAIT_FOR_LESS_BUSY_WORKER', 0.001).to_f
-
-# https://github.com/puma/puma/blob/master/5.0-Upgrade.md#nakayoshi_fork
-nakayoshi_fork unless ENV['DISABLE_PUMA_NAKAYOSHI_FORK'] == 'true'
-
-# Use json formatter
-require_relative "/home/git/gitlab/lib/gitlab/puma_logging/json_formatter"
-
-json_formatter = Gitlab::PumaLogging::JSONFormatter.new
-log_formatter do |str|
-  json_formatter.call(str)
-end