Revert "FEATURE: Add post language on creating a new post (#33001)" (#33157)

This reverts commit b55af383f779d01d983a3ccf1149438aee9c6725.

app/controllers/post_localizations_controller.rb

@@ -6,33 +6,20 @@ class PostLocalizationsController < ApplicationController
   def show
     guardian.ensure_can_localize_content!
 
-    params.require(:post_id)
+    params.require(%i[post_id])
+    localizations = PostLocalization.where(post_id: params[:post_id])
 
-    post = Post.find_by(id: params[:post_id])
-    return render json_error(I18n.t("not_found"), status: :not_found) if post.blank?
-
-    post_localizations = PostLocalization.where(post_id: post.id)
-
-    topic_localizations_by_locale = {}
-    if post.is_first_post?
-      TopicLocalization
-        .where(topic_id: post.topic_id)
-        .each { |tl| topic_localizations_by_locale[tl.locale] = tl }
-    end
-
-    post_localizations.each do |pl|
-      pl.define_singleton_method(:topic_localization) { topic_localizations_by_locale[pl.locale] }
-    end
-
-    render json: {
-             post_localizations:
+    if localizations
+      render json:
                ActiveModel::ArraySerializer.new(
-                 post_localizations,
+                 localizations,
                  each_serializer: PostLocalizationSerializer,
                  root: false,
                ).as_json,
-           },
-           status: :ok
+             status: :ok
+    else
+      render json_error I18n.t("not_found"), status: :not_found
+    end
   end
 
   def create_or_update