remove unused options

as we use flatpickr, we don't need these options

app/assets/javascripts/admin/util.js.erb

@@ -1,29 +1,4 @@
 $(document).ready(function(){
-  window.JQUERY_UI_DATE_PICKER_DEFAULTS = {
-    dateFormat: Spree.translations.date_picker,
-    dayNames: Spree.translations.abbr_day_names,
-    dayNamesMin: Spree.translations.abbr_day_names,
-    monthNames: Spree.translations.month_names,
-    prevText: Spree.translations.previous,
-    nextText: Spree.translations.next,
-    oneLine: true,
-    showOn: 'button',
-    buttonImage: "<%= asset_path 'datepicker/cal.gif' %>",
-    buttonImageOnly: true
-  }
-
-  window.JQUERY_UI_DATETIME_PICKER_DEFAULTS = Object.assign(
-    {},
-    window.JQUERY_UI_DATE_PICKER_DEFAULTS,
-    {
-      currentText: Spree.translations.datetime_ui_current_text,
-      closeText: Spree.translations.datetime_ui_close_text,
-      timeText: Spree.translations.datetime_ui_time_text,
-      timeFormat: 'HH:mm',
-      controlType: 'select',
-      stepMinute: 15
-    }
-  );
   window.FLATPICKR_DATE_DEFAULT = {
     dateFormat: Spree.translations.flatpickr_date_format,
     locale: I18n.locale

app/views/spree/admin/shared/_translations.html.erb

@@ -1,9 +1,6 @@
 <script>
   Spree.translations = <%==
-  { :date_picker    => Spree.t(:js_format,
-                              :scope => 'date_picker',
-                              :default => 'yy/mm/dd'),
-    :flatpickr_date_format    => Spree.t(:flatpickr_date_format,
+  {:flatpickr_date_format    => Spree.t(:flatpickr_date_format,
                               :scope => 'date_picker',
                               :default => 'Y-m-d H:i'),
     :abbr_day_names           => I18n.t(:abbr_day_names, :scope => :date),

config/locales/en.yml

@@ -3593,8 +3593,6 @@ See the %{link} to find out more about %{sitename}'s features and to start using
           or_enter_new_card: "Or, enter details for a new card:"
           remember_this_card: Remember this card?
     date_picker:
-      format: ! '%Y-%m-%d'
-      js_format: 'yy-mm-dd'
       flatpickr_date_format: "Y-m-d H:i"
     orders:
       error_flash_for_unavailable_items: "An item in your cart has become unavailable. Please update the selected quantities."