migrate to `package:async` unawaited

Change-Id: I6835e32658bbcf19f207fdc0e0f43ba0455c05b5
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/214683
Reviewed-by: Samuel Rawlins <srawlins@google.com>
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
Commit-Queue: Phil Quitslund <pquitslund@google.com>
diff --git a/pkg/analyzer/lib/src/workspace/bazel_watcher.dart b/pkg/analyzer/lib/src/workspace/bazel_watcher.dart
index cd56312..b3f09ec 100644
--- a/pkg/analyzer/lib/src/workspace/bazel_watcher.dart
+++ b/pkg/analyzer/lib/src/workspace/bazel_watcher.dart
@@ -10,7 +10,6 @@
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/physical_file_system.dart';
 import 'package:analyzer/instrumentation/service.dart';
-import 'package:pedantic/pedantic.dart';
 import 'package:watcher/watcher.dart';
 
 Future<void> _isolateMain(SendPort sendPort) async {
diff --git a/pkg/analyzer/pubspec.yaml b/pkg/analyzer/pubspec.yaml
index 3b0dae7..dd5d48d 100644
--- a/pkg/analyzer/pubspec.yaml
+++ b/pkg/analyzer/pubspec.yaml
@@ -20,7 +20,6 @@
   source_span: ^1.8.0
   watcher: ^1.0.0
   yaml: ^3.0.0
-  pedantic: ^1.10.0
 dev_dependencies:
   analyzer_utilities:
     path: ../analyzer_utilities