message: metervalues - remove unused index on timestamp
diff: @@ -130,7 +130,6 @@ export default class MongoDBStorage {
  ]);
  // MeterValues
  await this.handleIndexesInCollection(tenantID, 'metervalues', [
  - { fields: { timestamp: 1 } },
  { fields: { transactionId: 1 } }
  ]);
  // Status Notifications
  