re-re-enable lint unnecessary_const (#20103)

diff --git a/packages/flutter_tools/bin/fuchsia_tester.dart b/packages/flutter_tools/bin/fuchsia_tester.dart
index a038483..3fa170b 100644
--- a/packages/flutter_tools/bin/fuchsia_tester.dart
+++ b/packages/flutter_tools/bin/fuchsia_tester.dart
@@ -24,7 +24,7 @@
 const String _kOptionPackages = 'packages';
 const String _kOptionShell = 'shell';
 const String _kOptionTestDirectory = 'test-directory';
-const List<String> _kRequiredOptions = const <String>[
+const List<String> _kRequiredOptions = <String>[
   _kOptionPackages,
   _kOptionShell,
   _kOptionTestDirectory,