docs: public void deleteOutdatedFlatPushInformationData() {
          final Date historyDate = DateUtils.calculatePastDate(ConfigurationUtils.tryGetGlobalIntegerProperty(AEROGEAR_METRICS_STORAGE_MAX_DAYS, 30));
          logger.trace("Delete all until {}", historyDate.getTime());
          flatPushMessageInformationDao.deletePushInformationOlderThan(historyDate);
      }