Move pub into sdk/lib/_internal.

sdk/lib/_internal/pub/test/validator/dependency_test.dart

Index: sdk/lib/_internal/pub/test/validator/dependency_test.dart
diff --git a/utils/tests/pub/validator/dependency_test.dart b/sdk/lib/_internal/pub/test/validator/dependency_test.dart
similarity index 98%
rename from utils/tests/pub/validator/dependency_test.dart
rename to sdk/lib/_internal/pub/test/validator/dependency_test.dart
index 4001330aa9f665fc420fa3031b54fea463a370c1..433f8f23d17dffcc04c462bd01b0350bb276f03a 100644
--- a/utils/tests/pub/validator/dependency_test.dart
+++ b/sdk/lib/_internal/pub/test/validator/dependency_test.dart
@@ -10,9 +10,9 @@ import 'package:http/testing.dart';
 import 'package:pathos/path.dart' as path;
 import 'package:scheduled_test/scheduled_test.dart';
 
-import '../../../pub/entrypoint.dart';
-import '../../../pub/validator.dart';
-import '../../../pub/validator/dependency.dart';
+import 'package:pub/src/entrypoint.dart';
+import 'package:pub/src/validator.dart';
+import 'package:pub/src/validator/dependency.dart';
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 import 'utils.dart';