cleanup translation keys

translations/messages.ru.xlf

@@ -219,14 +219,6 @@
         <source>dashboard.title</source>
         <target state="translated">Информпанель</target>
       </trans-unit>
-      <trans-unit id="3PYadzb" resname="dashboard.subtitle">
-        <source>dashboard.subtitle</source>
-        <target>Добро пожаловать!</target>
-      </trans-unit>
-      <trans-unit id="yEa1Yz3" resname="dashboard.all">
-        <source>dashboard.all</source>
-        <target>Все пользователи</target>
-      </trans-unit>
       <!--
               Widgets
             -->
@@ -760,10 +752,6 @@
         <source>menu.plugin</source>
         <target state="translated">Плагины</target>
       </trans-unit>
-      <trans-unit id="I.eil4u" resname="menu.export">
-        <source>menu.export</source>
-        <target>Экспорт</target>
-      </trans-unit>
       <trans-unit id="6OKwCUB" resname="menu.system">
         <source>menu.system</source>
         <target>Система</target>