Refactor strong mode to use standard Analyzer errors

pkg/analyzer/lib/src/task/options.dart

Index: pkg/analyzer/lib/src/task/options.dart
diff --git a/pkg/analyzer/lib/src/task/options.dart b/pkg/analyzer/lib/src/task/options.dart
index fd1c224ef8d92a256d2d8b2c7a63c79f5ec203b8..0f47c443d5cc1a7b51e50d40dd78a1ddd9028347 100644
--- a/pkg/analyzer/lib/src/task/options.dart
+++ b/pkg/analyzer/lib/src/task/options.dart
@@ -15,7 +15,6 @@ import 'package:analyzer/src/generated/java_engine.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/utilities_general.dart';
 import 'package:analyzer/src/task/general.dart';
-import 'package:analyzer/src/task/strong/info.dart';
 import 'package:analyzer/task/general.dart';
 import 'package:analyzer/task/model.dart';
 import 'package:source_span/source_span.dart';
@@ -161,8 +160,6 @@ class ErrorFilterOptionValidator extends OptionsValidator {
       _errorCodes = new HashSet<String>();
       // Engine codes.
       _errorCodes.addAll(ErrorCode.values.map((ErrorCode code) => code.name));
-      // Strong-mode codes.
-      _errorCodes.addAll(StaticInfo.names);
     }
     return _errorCodes;
   }