chore: Centralize outgoing message reply restrictions for all the channels (#11279)

app/models/channel/api.rb

@@ -33,10 +33,6 @@ class Channel::Api < ApplicationRecord
     'API'
   end
 
-  def messaging_window_enabled?
-    additional_attributes.present? && additional_attributes['agent_reply_time_window'].present?
-  end
-
   private
 
   def ensure_valid_agent_reply_time_window

app/models/channel/facebook_page.rb

@@ -32,10 +32,6 @@ class Channel::FacebookPage < ApplicationRecord
     'Facebook'
   end
 
-  def messaging_window_enabled?
-    false
-  end
-
   def create_contact_inbox(instagram_id, name)
     @contact_inbox = ::ContactInboxWithContactBuilder.new({
                                                             source_id: instagram_id,

app/models/channel/twilio_sms.rb

@@ -41,10 +41,6 @@ class Channel::TwilioSms < ApplicationRecord
     medium == 'sms' ? 'Twilio SMS' : 'Whatsapp'
   end
 
-  def messaging_window_enabled?
-    medium == 'whatsapp'
-  end
-
   def send_message(to:, body:, media_url: nil)
     params = send_message_from.merge(to: to, body: body)
     params[:media_url] = media_url if media_url.present?

app/models/channel/whatsapp.rb

@@ -46,10 +46,6 @@ class Channel::Whatsapp < ApplicationRecord
     end
   end
 
-  def messaging_window_enabled?
-    true
-  end
-
   def mark_message_templates_updated
     # rubocop:disable Rails/SkipsModelValidations
     update_column(:message_templates_last_updated, Time.zone.now)