DEV: Remove all code referencing at_desktop bookmark reminders (#9650)

We have found no need for these reminder types, so we are removing the code for them.

lib/auth/default_current_user_provider.rb

@@ -124,10 +124,6 @@ class Auth::DefaultCurrentUserProvider
         u.update_last_seen!
         u.update_ip_address!(ip)
       end
-
-      BookmarkReminderNotificationHandler.defer_at_desktop_reminder(
-        user: u, request_user_agent: @request.user_agent
-      )
     end
 
     @env[CURRENT_USER_KEY] = current_user

lib/bookmark_manager.rb

@@ -29,7 +29,6 @@ class BookmarkManager
 
     update_topic_user_bookmarked(topic: post.topic, bookmarked: true)
 
-    BookmarkReminderNotificationHandler.cache_pending_at_desktop_reminder(@user)
     bookmark
   end
 
@@ -40,7 +39,6 @@ class BookmarkManager
     raise Discourse::InvalidAccess.new if !Guardian.new(@user).can_delete?(bookmark)
 
     bookmark.destroy
-    clear_at_desktop_cache_if_required
 
     bookmarks_remaining_in_topic = Bookmark.exists?(topic_id: bookmark.topic_id, user: @user)
     if !bookmarks_remaining_in_topic
@@ -61,8 +59,6 @@ class BookmarkManager
 
       update_topic_user_bookmarked(topic: topic, bookmarked: false)
     end
-
-    clear_at_desktop_cache_if_required
   end
 
   def self.send_reminder_notification(id)
@@ -94,15 +90,6 @@ class BookmarkManager
 
   private
 
-  def clear_at_desktop_cache_if_required
-    return if user_has_any_pending_at_desktop_reminders?
-    Discourse.redis.del(BookmarkReminderNotificationHandler::PENDING_AT_DESKTOP_KEY_PREFIX + @user.id.to_s)
-  end
-
-  def user_has_any_pending_at_desktop_reminders?
-    Bookmark.at_desktop_reminders_for_user(@user).any?
-  end
-
   def update_topic_user_bookmarked(topic:, bookmarked:)
     TopicUser.change(@user.id, topic, bookmarked: bookmarked)
   end

lib/bookmark_reminder_notification_handler.rb

@@ -1,9 +1,6 @@
 # frozen_string_literal: true
 
 class BookmarkReminderNotificationHandler
-  PENDING_AT_DESKTOP_KEY_PREFIX ||= 'pending_at_desktop_bookmark_reminder_user_'
-  PENDING_AT_DESKTOP_EXPIRY_DAYS ||= 20
-
   def self.send_notification(bookmark)
     return if bookmark.blank?
     Bookmark.transaction do
@@ -42,31 +39,4 @@ class BookmarkReminderNotificationHandler
       }.to_json
     )
   end
-
-  def self.user_has_pending_at_desktop_reminders?(user)
-    Discourse.redis.exists("#{PENDING_AT_DESKTOP_KEY_PREFIX}#{user.id}")
-  end
-
-  def self.cache_pending_at_desktop_reminder(user)
-    Discourse.redis.setex("#{PENDING_AT_DESKTOP_KEY_PREFIX}#{user.id}", PENDING_AT_DESKTOP_EXPIRY_DAYS.days, true)
-  end
-
-  def self.send_at_desktop_reminder(user:, request_user_agent:)
-    return if MobileDetection.mobile_device?(request_user_agent)
-
-    return if !user_has_pending_at_desktop_reminders?(user)
-
-    DistributedMutex.synchronize("sending_at_desktop_bookmark_reminders_user_#{user.id}") do
-      Bookmark.at_desktop_reminders_for_user(user).each do |bookmark|
-        BookmarkReminderNotificationHandler.send_notification(bookmark)
-      end
-      Discourse.redis.del("#{PENDING_AT_DESKTOP_KEY_PREFIX}#{user.id}")
-    end
-  end
-
-  def self.defer_at_desktop_reminder(user:, request_user_agent:)
-    Scheduler::Defer.later "Sending Desktop Bookmark Reminders" do
-      send_at_desktop_reminder(user: user, request_user_agent: request_user_agent)
-    end
-  end
 end