Do not eager load elements in pages controller

Pages make use of fragment caching and we cannot know which element is cached.

Therefore we cannot know what to eager load.

Closes AlchemyCMS#2468

This partially reverts commit 0aa84d0.

app/controllers/alchemy/pages_controller.rb

@@ -104,14 +104,7 @@ def locale_prefix_not_allowed?
     # If no index page and no admin users are present we show the "Welcome to Alchemy" page.
     #
     def load_index_page
-      @page ||= begin
-        Alchemy::Page.
-          contentpages.
-          language_roots.
-          where(language: Language.current).
-          includes(page_includes).
-          first
-      end
+      @page ||= Language.current_root_page
       render template: "alchemy/welcome", layout: false if signup_required?
     end
 
@@ -127,13 +120,10 @@ def load_index_page
     def load_page
       page_not_found! unless Language.current
 
-      @page ||= begin
-        Alchemy::Page.
-          contentpages.
-          where(language: Language.current).
-          includes(page_includes).
-          find_by(urlname: params[:urlname])
-      end
+      @page ||= Language.current.pages.contentpages.find_by(
+        urlname: params[:urlname],
+        language_code: params[:locale] || Language.current.code,
+      )
     end
 
     def enforce_locale
@@ -244,9 +234,5 @@ def must_not_cache?
     def page_not_found!
       not_found_error!("Alchemy::Page not found \"#{request.fullpath}\"")
     end
-
-    def page_includes
-      Alchemy::EagerLoading.page_includes(version: :public_version)
-    end
   end
 end