Revert "fix #114"

This reverts commit 298eae9.

Form/EventListener/TranslationsListener.php

@@ -13,7 +13,6 @@
 class TranslationsListener implements EventSubscriberInterface
 {
     private $translationForm;
-    private $unusedLocales = array();
 
     /**
      *
@@ -49,22 +48,6 @@ public function preSetData(FormEvent $event)
         }
     }
 
-    /**
-     *
-     * @param \Symfony\Component\Form\FormEvent $event
-     */
-    public function preSubmit(FormEvent $event)
-    {
-        $data = $event->getData();
-
-        foreach ($data as $locale => $translation) {
-            // Detect and trace unused locale
-            if (!array_filter($translation)) {
-                $this->unusedLocales[$locale] = $locale;
-            }
-        }
-    }
-
     /**
      *
      * @param \Symfony\Component\Form\FormEvent $event
@@ -74,9 +57,9 @@ public function submit(FormEvent $event)
         $data = $event->getData();
 
         foreach ($data as $locale => $translation) {
-            // Remove unused locale if necessary
-            if (isset($this->unusedLocales[$locale])) {
-                unset($data[$locale]);
+            // Remove useless Translation object
+            if (!$translation) {
+                $data->removeElement($translation);
 
             } else {
                 $translation->setLocale($locale);
@@ -88,8 +71,7 @@ public static function getSubscribedEvents()
     {
         return array(
             FormEvents::PRE_SET_DATA => 'preSetData',
-            FormEvents::PRE_SUBMIT => 'preSubmit',
             FormEvents::SUBMIT => 'submit',
         );
     }
-}
+}