Update lru_garbage_collector.test.ts

Author: schmidt-sebastian

packages/firestore/test/unit/local/lru_garbage_collector.test.ts

@@ -52,7 +52,6 @@ import { key, path, version, wrapObject } from '../../util/helpers';
 import { SortedMap } from '../../../src/util/sorted_map';
 import * as PersistenceTestHelpers from './persistence_test_helpers';
 import { primitiveComparator } from '../../../src/util/misc';
-import { IndexedDbTransactionError } from '../../../src/local/simple_db';
 
 describe('IndexedDbLruDelegate', () => {
   if (!IndexedDbPersistence.isAvailable()) {