Use existing lang string for log deletion

Author: Kristan Kenney

web/templates/admin/list_auth.html

@@ -11,7 +11,7 @@
           <?=_('Delete')?>
           <input type="hidden" name="delete_url" value="/delete/user/log/?token=<?=$_SESSION['token']?>" />
             <div class="confirmation-text-delete hidden" title="<?=_('Confirmation')?>">
-              <p class="confirmation"><?=_('Are you sure you want to delete the login history for this user?')?></p>
+              <p class="confirmation"><?=_('DELETE_LOGS_CONFIRMATION')?></p>
             </div>
         </a>
       </div>