remove download_as_zip feature flag

app/controllers/instructeurs/dossiers_controller.rb

@@ -183,7 +183,7 @@ module Instructeurs
     end
 
     def telecharger_pjs
-      return head(:forbidden) if !feature_enabled?(:instructeur_download_as_zip) || !dossier.attachments_downloadable?
+      return head(:forbidden) if !dossier.attachments_downloadable?
 
       files = ActiveStorage::DownloadableFile.create_list_from_dossier(dossier)
 

app/views/instructeurs/dossiers/_header_actions.html.haml

@@ -7,7 +7,7 @@
     %li
       = link_to "Uniquement cet onglet", "#", onclick: "window.print()", class: "menu-item menu-link"
 
-- if feature_enabled?(:instructeur_download_as_zip) && !PiecesJustificativesService.liste_pieces_justificatives(dossier).empty?
+- if !PiecesJustificativesService.liste_pieces_justificatives(dossier).empty?
   %span.dropdown.print-menu-opener
     %button.button.dropdown-button.icon-only
       %span.icon.attachment

config/initializers/flipper.rb

@@ -30,7 +30,6 @@ features = [
   :administrateur_web_hook,
   :insee_api_v3,
   :instructeur_bypass_email_login_token,
-  :instructeur_download_as_zip,
   :maintenance_mode,
   :mini_profiler,
   :operation_log_serialize_subject,