Remove "whats new" feature flag

This commit removes the "whats new" feature flag and enables the feature
for everyone: EE, and CE.

part of:
https://gitlab.com/gitlab-org/gitlab/-/issues/254186

app/controllers/whats_new_controller.rb

@@ -5,7 +5,6 @@ class WhatsNewController < ApplicationController
 
   skip_before_action :authenticate_user!
 
-  before_action :check_feature_flag
   before_action :check_valid_page_param, :set_pagination_headers, unless: -> { has_version_param? }
 
   feature_category :navigation
@@ -20,10 +19,6 @@ class WhatsNewController < ApplicationController
 
   private
 
-  def check_feature_flag
-    render_404 unless Feature.enabled?(:whats_new_drawer, current_user)
-  end
-
   def check_valid_page_param
     render_404 if current_page < 1
   end

app/views/layouts/header/_default.html.haml

@@ -120,8 +120,7 @@
         = sprite_icon('ellipsis_h', size: 12, css_class: 'more-icon js-navbar-toggle-right')
         = sprite_icon('close', size: 12, css_class: 'close-icon js-navbar-toggle-left')
 
-- if ::Feature.enabled?(:whats_new_drawer, current_user)
-  #whats-new-app{ data: { storage_key: whats_new_storage_key, versions: whats_new_versions, gitlab_dot_com: Gitlab.dev_env_org_or_com? } }
+#whats-new-app{ data: { storage_key: whats_new_storage_key, versions: whats_new_versions, gitlab_dot_com: Gitlab.dev_env_org_or_com? } }
 
 - if can?(current_user, :update_user_status, current_user)
   .js-set-status-modal-wrapper{ data: user_status_data }

app/views/layouts/header/_help_dropdown.html.haml

 %ul
   - if current_user_menu?(:help)
-    = render_if_exists 'layouts/header/whats_new_dropdown_item'
+    = render 'layouts/header/whats_new_dropdown_item'
     %li
       = link_to _("Help"), help_path
     %li

app/views/layouts/header/_whats_new_dropdown_item.html.haml

+%li
+  %button.gl-justify-content-space-between.gl-align-items-center.js-whats-new-trigger{ type: 'button', data: { storage_key: whats_new_storage_key }, class: 'gl-display-flex!' }
+    = _("What's new")
+    %span.js-whats-new-notification-count.whats-new-notification-count
+      = whats_new_most_recent_release_items_count

changelogs/unreleased/jswain_whats_new_remove_feature_flag.yml

+---
+title: Add "What's new" item to the help dropdown
+merge_request: 52020
+author:
+type: changed

ee/app/views/layouts/header/_whats_new_dropdown_item.html.haml

-- if ::Feature.enabled?(:whats_new_dropdown, current_user)
-  - if ::Feature.enabled?(:whats_new_drawer, current_user)
-    %li
-      %button.gl-justify-content-space-between.gl-align-items-center.js-whats-new-trigger{ type: 'button', data: { storage_key: whats_new_storage_key }, class: 'gl-display-flex!' }
-        = _("What's new")
-        %span.js-whats-new-notification-count.whats-new-notification-count
-          = whats_new_most_recent_release_items_count
-  - else
-    %li
-      = link_to _("What's new"), "#{promo_url}/releases/gitlab-com/", target: '_blank', rel: 'noopener noreferrer', data: { track_event: 'click_whats_new', track_property: 'question_menu' }

ee/spec/features/whats_new_spec.rb → spec/features/whats_new_spec.rb

@@ -6,8 +6,6 @@ RSpec.describe "renders a `whats new` dropdown item", :js do
   let_it_be(:user) { create(:user) }
 
   before do
-    stub_feature_flags(whats_new_dropdown: true, whats_new_drawer: true)
-
     sign_in(user)
   end
 

spec/requests/whats_new_controller_spec.rb

@@ -7,11 +7,6 @@ RSpec.describe WhatsNewController do
     let(:item) { double(:item) }
     let(:highlights) { double(:highlight, items: [item], map: [item].map, next_page: 2) }
 
-    context 'with whats_new_drawer feature enabled' do
-      before do
-        stub_feature_flags(whats_new_drawer: true)
-      end
-
     context 'with no page param' do
       it 'responds with paginated data and headers' do
         allow(ReleaseHighlight).to receive(:paginated).with(page: 1).and_return(highlights)
@@ -50,17 +45,4 @@ RSpec.describe WhatsNewController do
       end
     end
   end
-
-    context 'with whats_new_drawer feature disabled' do
-      before do
-        stub_feature_flags(whats_new_drawer: false)
-      end
-
-      it 'returns a 404' do
-        get whats_new_path, xhr: true
-
-        expect(response).to have_gitlab_http_status(:not_found)
-      end
-    end
-  end
 end