Remove unused link_to_older and link_to_newer helper methods (#29620)

app/helpers/statuses_helper.rb

@@ -4,14 +4,6 @@ module StatusesHelper
   EMBEDDED_CONTROLLER = 'statuses'
   EMBEDDED_ACTION = 'embed'
 
-  def link_to_newer(url)
-    link_to t('statuses.show_newer'), url, class: 'load-more load-gap'
-  end
-
-  def link_to_older(url)
-    link_to t('statuses.show_older'), url, class: 'load-more load-gap'
-  end
-
   def nothing_here(extra_classes = '')
     content_tag(:div, class: "nothing-here #{extra_classes}") do
       t('accounts.nothing_here')