dropIndex = async (funcLogger, collectionName, indexName) => {
  const logger = funcLogger.child({ helper: 'mongo', funcName: 'dropIndex' });

  logger.debug({ collectionName, indexName }, 'Dropping index from MongoDB');
  const collection = database.collection(collectionName);
  const result = collection.dropIndex(indexName);
  logger.debug({ result }, 'Dropped index from MongoDB');

  return result;
}
Drop index

@param {*} funcLogger
@param {*} collectionName
@param {*} indexName
@returns