Réparation de la liste des langues (#2704)

* fix language list

* remove unused locales

* other places

app/views/admin/application/l10n/_form.html.erb

 <%= f.association :language,
                   include_blank: false,
                   collection: current_university.languages.ordered,
-                  label_method: lambda { |l| t("languages.#{l.iso_code.to_s}") } %>
+                  label_method: lambda { |l| language_name(l.iso_code) } %>

app/views/admin/users/show.html.erb

@@ -23,7 +23,7 @@
         </tr>
         <tr>
           <td><%= User.human_attribute_name('language') %></td>
-          <td class="text-end"><%= t("languages.#{@user.language.iso_code.to_s}") %></td>
+          <td class="text-end"><%= language_name(@user.language.iso_code) %></td>
         </tr>
         <% if @user.person %>
           <tr>

app/views/devise/registrations/new.html.erb

@@ -24,7 +24,7 @@
       <%= f.association :language,
                         required: true,
                         collection: Language.available_for_interface,
-                        label_method: lambda { |l| t("languages.#{l.iso_code.to_s}") },
+                        label_method: lambda { |l| language_name(l.iso_code) },
                         include_blank: :translate %>
     </div>
     <div class="col-lg-6">

config/locales/en.yml

@@ -396,9 +396,6 @@ en:
   inactivity_alert: "It seems you have been away a little bit too long. Could you please retry?"
   internationalization:
     label: Internationalization
-  languages:
-    en: English
-    fr: French
   legal: Legal
   loading: Loading...
   localization:

config/locales/fr.yml

@@ -396,9 +396,6 @@ fr:
   inactivity_alert: "Il semble que vous soyez resté sur la page un peu trop longtemps. Pouvez-vous ré-essayer ?"
   internationalization:
     label: Internationalisation
-  languages:
-    en: Anglais
-    fr: Français
   legal: Légal
   loading: Chargement...
   localization: