DEV: Renaming TopicsController defer track visit (#27761)

Followup to 527f02e99f,
I had to introduce defer_track_visit_v2 because discourse-docs
relied on defer_track_visit. Now that discourse-docs
is using the new method as of
discourse/discourse-docs@0d9365571b,
we can rename it in core. Then we will need one more PR
in both core and docs to remove usage of the "v2" method.

app/controllers/topics_controller.rb

@@ -1285,16 +1285,15 @@ class TopicsController < ApplicationController
     TopicsController.defer_track_visit_v2(topic_id, user_id) if should_track_visit_to_topic?
   end
 
-  # TODO (martin) Remove this once discourse-docs is updated.
-  def self.defer_track_visit(topic_id, ip, user_id, track_visit)
-    self.defer_track_visit_v2(topic_id, user_id) if track_visit
-    self.defer_topic_view(topic_id, ip, user_id)
-  end
-  def self.defer_track_visit_v2(topic_id, user_id)
+  def self.defer_track_visit(topic_id, user_id)
     Scheduler::Defer.later "Track Visit" do
       TopicUser.track_visit!(topic_id, user_id)
     end
   end
+  # TODO (martin) Remove this once discourse-docs is updated.
+  def self.defer_track_visit_v2(topic_id, user_id)
+    defer_track_visit(topic_id, user_id)
+  end
 
   def self.defer_topic_view(topic_id, ip, user_id = nil)
     Scheduler::Defer.later "Topic View" do