phrase_editor: unused phrase removed from translations.

app/src/main/res/values-ar/phrase_editor.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!--Generated by crowdin.com-->
 <resources>
-  <string name="events_phrases_title">عبارات مفتاحية</string>
   <string name="phrase_add">أضف عبارة</string>
   <string name="phrase_delete">حذف عبارة</string>
   <string name="phrase_delete_confirm">هل ترغب حقاً في حذف العبارة %s؟</string>

app/src/main/res/values-es-rES/phrase_editor.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!--Generated by crowdin.com-->
 <resources>
-  <string name="events_phrases_title">Frases clave</string>
   <string name="phrase_add">Añadir frase</string>
   <string name="phrase_delete">Borrar frase</string>
   <string name="phrase_delete_confirm">¿De verdad quieres eliminar la frase: %s?</string>

app/src/main/res/values-ja-rJP/phrase_editor.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!--Generated by crowdin.com-->
 <resources>
-  <string name="events_phrases_title">キーフレーズ</string>
   <string name="phrase_add">フレーズを追加</string>
   <string name="phrase_delete">フレーズを削除</string>
   <string name="phrase_delete_confirm">語句を削除してもよろしいですか: %s?</string>

app/src/main/res/values-ru-rRU/phrase_editor.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!--Generated by crowdin.com-->
 <resources>
-  <string name="events_phrases_title">Ключевые фразы</string>
   <string name="phrase_add">Добавить фразу</string>
   <string name="phrase_delete">Удалить фразу</string>
   <string name="phrase_delete_confirm">Вы действительно хотите удалить фразу: %s?</string>

app/src/main/res/values-zh-rCN/phrase_editor.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!--Generated by crowdin.com-->
 <resources>
-  <string name="events_phrases_title">关键短语</string>
   <string name="phrase_add">添加短语</string>
   <string name="phrase_delete">删除短语</string>
   <string name="phrase_delete_confirm">确实要删除短语: %s？</string>