Merge pull request rails#25293 from y-yagi/remove_needless_comments

remove needless comments

Author: matthewd

actioncable/lib/rails/generators/channel/templates/application_cable/channel.rb

@@ -1,4 +1,3 @@
-# Be sure to restart your server when you modify this file. Action Cable runs in a loop that does not support auto reloading.
 module ApplicationCable
   class Channel < ActionCable::Channel::Base
   end

actioncable/lib/rails/generators/channel/templates/application_cable/connection.rb

@@ -1,4 +1,3 @@
-# Be sure to restart your server when you modify this file. Action Cable runs in a loop that does not support auto reloading.
 module ApplicationCable
   class Connection < ActionCable::Connection::Base
   end

actioncable/lib/rails/generators/channel/templates/channel.rb

@@ -1,4 +1,3 @@
-# Be sure to restart your server when you modify this file. Action Cable runs in a loop that does not support auto reloading.
 <% module_namespacing do -%>
 class <%= class_name %>Channel < ApplicationCable::Channel
   def subscribed