Fix analyzer hints and warnings in test/.

test/global/binstubs/removes_when_deactivated_test.dart

Index: test/global/binstubs/removes_when_deactivated_test.dart
diff --git a/test/global/binstubs/removes_when_deactivated_test.dart b/test/global/binstubs/removes_when_deactivated_test.dart
index b6bb6110d6a73d9f73ae8530cd84fd8591241758..1e583407c0208372d520a3ff944fcdacc0eac888 100644
--- a/test/global/binstubs/removes_when_deactivated_test.dart
+++ b/test/global/binstubs/removes_when_deactivated_test.dart
@@ -2,11 +2,8 @@
 // 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 'package:scheduled_test/scheduled_test.dart';
-
 import '../../descriptor.dart' as d;
 import '../../test_pub.dart';
-import 'utils.dart';
 
 main() {
   integration("removes binstubs when the package is deactivated", () {