Remove unnecessary import
diff --git a/pkgs/test_api/lib/src/backend/metadata.dart b/pkgs/test_api/lib/src/backend/metadata.dart
index f63bcf7..0e64f8d 100644
--- a/pkgs/test_api/lib/src/backend/metadata.dart
+++ b/pkgs/test_api/lib/src/backend/metadata.dart
@@ -2,8 +2,6 @@
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
-import 'dart:collection';
-
import 'package:boolean_selector/boolean_selector.dart';
import 'package:collection/collection.dart';