Revert "Add AB test for Contents list"

This reverts commit 731b245.

app/controllers/content_items_controller.rb

@@ -1,7 +1,6 @@
 require "slimmer/headers"
 
 class ContentItemsController < ApplicationController
-  include ContentsListAbTestable
   include GovukPersonalisation::ControllerConcern
   include Slimmer::Headers
   include Slimmer::Template
@@ -16,9 +15,6 @@ class ContentItemsController < ApplicationController
   rescue_from PresenterBuilder::SpecialRouteReturned, with: :error_notfound
   rescue_from PresenterBuilder::GovernmentReturned, with: :error_notfound
 
-  helper_method :contents_list_variant
-  helper_method :step_by_step_page_under_test?
-
   attr_accessor :content_item, :taxonomy_navigation
 
   content_security_policy do |p|
@@ -36,10 +32,6 @@ def show
     elsif is_history_page?
       show_history_page
     else
-      if step_by_step_page_under_test?
-        set_contents_list_response_header
-      end
-
       set_guide_draft_access_token if @content_item.is_a?(GuidePresenter)
       render_template
     end
@@ -65,8 +57,6 @@ def service_sign_in_options
 
 private
 
-  helper_method :show_contents_list_ab_test?
-
   def is_history_page?
     @content_item.document_type == "history"
   end

app/views/content_items/guide.html.erb

@@ -5,7 +5,7 @@
     canonical_url: @content_item.canonical_url,
     body: @content_item.has_parts? ? @content_item.current_part_body : nil
   ) %>
-  <%= contents_list_variant.analytics_meta_tag.html_safe if step_by_step_page_under_test? %>
+
   <%= @requested_variant.analytics_meta_tag.html_safe if @requested_variant.present? %>
 <% end %>
 
@@ -25,7 +25,7 @@
       font_size: "xl",
       margin_bottom: 8
     } %>
-    <% if show_contents_list_ab_test? || @content_item.show_guide_navigation? %>
+    <% if @content_item.show_guide_navigation? %>
       <%= render "govuk_publishing_components/components/skip_link", {
         text: t("guide.skip_contents"),
         href: "#guide-contents"

test/controllers/content_items_controller_test.rb

@@ -368,48 +368,6 @@ class ContentItemsControllerTest < ActionController::TestCase
     assert_equal "true", @response.headers[Slimmer::Headers::REMOVE_SEARCH_HEADER]
   end
 
-  test "Contents List AB test variant A" do
-    content_item = content_store_has_schema_example("guide", "guide-with-step-navs")
-    content_item["base_path"] = "/help-with-childcare-costs/support-while-you-study"
-    content_item["details"]["hide_chapter_navigation"] = true
-
-    stub_content_store_has_item(content_item["base_path"], content_item)
-
-    with_variant ContentsList: "A" do
-      get :show, params: { path: "help-with-childcare-costs/support-while-you-study" }
-      assert_response :success
-      assert_not response.body.include?("contents-list")
-    end
-  end
-
-  test "Contents List AB test variant B" do
-    content_item = content_store_has_schema_example("guide", "guide-with-step-navs")
-    content_item["base_path"] = "/help-with-childcare-costs/support-while-you-study"
-    content_item["details"]["hide_chapter_navigation"] = true
-
-    stub_content_store_has_item(content_item["base_path"], content_item)
-
-    with_variant ContentsList: "B" do
-      get :show, params: { path: "help-with-childcare-costs/support-while-you-study" }
-      assert_response :success
-      assert response.body.include?("contents-list")
-    end
-  end
-
-  test "Contents List AB test variant Z" do
-    content_item = content_store_has_schema_example("guide", "guide-with-step-navs")
-    content_item["base_path"] = "/help-with-childcare-costs/support-while-you-study"
-    content_item["details"]["hide_chapter_navigation"] = true
-
-    stub_content_store_has_item(content_item["base_path"], content_item)
-
-    with_variant ContentsList: "Z" do
-      get :show, params: { path: "help-with-childcare-costs/support-while-you-study" }
-      assert_response :success
-      assert_not response.body.include?("contents-list")
-    end
-  end
-
   def path_for(content_item, locale = nil)
     base_path = content_item["base_path"].sub(/^\//, "")
     base_path.gsub!(/\.#{locale}$/, "") if locale